• Dernière image d'ISON

    Comet_ISON_SLOOH_20130819'
     
    2013.08.19, 05:33 UT. The 14-inch Slooh telescope at 7800 ft Canary Islands site was used by amateur Don Cranford.
    A luminance filter was used (400 to 700 nm). [Vignetting removed by webmaster.]


  • Commentaires

    1
    Ferlin1 Profil de Ferlin1
    Jeudi 22 Août 2013 à 00:34
    Traduction google, mais c'est compréhensible.... Ces nouvelles images semblent confirmer que la comète est toujours là, mais on dirait qu'il peut ne pas être aussi brillant que tout le monde espérait. Pourquoi n'avons-nous pas vu de nouvelles images de ISON depuis si longtemps? La réponse réside dans la géométrie du système solaire. Les orbites de la comète ISON et la Terre sont telles que pour les quelques derniers mois, la comète a été perdue dans l'éclat lumineux du Soleil. La comète est de l'autre côté du Soleil par la Terre, encore bien au-delà de l'orbite de Mars. Et la comète est encore extrêmement faible, de sorte que toute la luminosité dans le ciel marais de la faible lumière de la comète. Comme les oscillations de la Terre autour de son orbite et la comète s'approche du Soleil, les positions relatives de la comète et le Soleil vu de la Terre changement, de sorte que la comète sera plus séparé du Soleil et apparaître dans un ciel plus sombre. Ce film de Goddard Space Flight Center de la NASA montre comment comète ISON se déplace à travers le système solaire: Ainsi, lorsque Hubble ne saute revenir? La première occasion de nouvelles images de la comète ISON de Hubble ne sera pas avant la mi-Octobre, lorsque la comète apparaît assez loin du Soleil dans le ciel. Hubble ne peut pas pointer tout ce qui est à moins de 50 ° du Soleil. Cela semble être une assez grande zone à éviter, mais il reste suffisamment grande pour empêcher la lumière du soleil parasite d'endommager des instruments extrêmement sensibles du télescope.
    2
    Christian
    Jeudi 22 Août 2013 à 07:27
    Salut Damien J'aimerais ton avis sur cette vidéo issus d'une archive cartographique de Hubble concernant ISON , qui serait en fait un bidule machin trucmuche . C'est assez déconcertant http://www.youtube.com/watch?v=HLOX76L2A18 Si tu veux vérifier toi même http://hla.stsci.edu/cgi-bin/display?image=hlsp_ison_hst_wfc3_130430_f606w_v1&autoscale=&title=Ison+130430+WFC3+F606W Déplace ton curseur sur la flèche du haut pour faire apparaitre la comète , clique au moins trois fois , clique sur Darker jusqu'au résultat voulu .. Alors Comète ou leurre ??? D-ISON jais un doute maintenant ;-)
      • Ferlin1 Profil de Ferlin1
        Samedi 24 Août 2013 à 19:21
        Salut Christian. Nous avons vu que les dernières photos d'Ison sont tout à fait normales. Alors je ne suis pas spécialiste des images d'Hubble, mais c est peut-être un reflet sur les optiques ou quelque chose de similaire... Pour Elenin, ce fut pareil, il y avait une serie d'objets l'entourant, mais en fait, ce n'était que des reflets.
    3
    neo
    Jeudi 22 Août 2013 à 20:08
    http://earthsky.org/space/this-date-in-science-the-definitive-discovery-of-neptunes-rings?utm_source=EarthSky+News&utm_campaign=69d8123437-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-69d8123437-393511181 This date in science: Definitive discovery of Neptune’s rings Neptune's rings via Voyager 2. Neptune's rings via Voyager 2. When the NASA spacecraft Voyager 2 skimmed by Neptune, it acquired images of a faint, continuous ring system encircling the planet. August 22, 1989. When NASA’s Voyager 2 spacecraft skimmed past the planet Neptune on this date, it discovered a faint but continuous ring system encircling the planet. Scientists had suspected there were rings around Neptune some years earlier. After all, Uranus had rings, discovered in 1977. And, watching from Earth in 1984, astronomers were able to see extra blinks before and after Neptune passed in front of a distant star. Still, Voyager 2 made the definitive discovery of Neptune’s rings a few days before it swept closest to the planet. Neptune's rings via Voyager 2. Neptune has a faint, continuous ring system. This Voyager 2 image is shown at increased brightness, to bring out fainter features. Today, Voyager 2 remains the only earthly spacecraft to have encountered Neptune. Since Voyager’s fly-by, however, the Hubble Space Telescope and Earth-based telescopes have been able to acquire images of the two brightest rings of Neptune. Those two rings are called Adams and Le Verrier, for John Couch Adams and Urbain Jean Joseph Le Verrier, whose independent calculations led to a position for Neptune on the sky’s dome and hence to its discovery in 1846. The fainter rings of Neptune are still far below the threshold for visibility from Earth’s vicinity. The outermost ring, Adams, contains three prominent arcs now named Liberty, Equality and Fraternity. The existence of arcs is hard to understand because the laws of motion would predict that arcs spread out into a uniform ring over very short timescales. The gravitational effects of Galatea, a moon just inward from the ring, are now believed to confine the arcs. Bottom line: On August 22, 1989, while still a few days out from its closest approach to Neptune, the Voyager 2 spacecraft made the definitive discovery of rings for this outer planet. MORE FROM EARTH SKY Enjoying EarthSky? Subscribe. Moon in the country of midnight sun Ice age figurine’s head found Delicate Arch illuminated by flashlight Comet ISON’s path across our sky http://earthsky.org/todays-image/comet-isons-path-across-our-sky EarthSky // Today's Image Release Date: Aug 20, 2013 0 Comet ISON’s path across our sky This chart shows how we on Earth see Comet ISON in front of the background stars, as it falls toward the sun, moving from the outer to the inner solar system. View larger. | Comet ISON from its discovery in December 2012 through October 2013. View larger. | Comet ISON from its discovery in December 2012 through October 2013. Chart via NASA. This track across our sky’s dome shows the most intriguing comet of 2013 – comet C/2012 S1 (ISON) – from its discovery in December 2012 until October 2013. During these months, Comet ISON tracks through the constellations Gemini, Cancer, and Leo as it falls toward the sun. Its closest point to the sun will be November 28, 2013. Look here for a monthly viewing guide for Comet ISON. When it was discovered in late 2012, this comet appeared unusually active for its distance from the sun. Many believed at that time that ISON could rank as one of the brightest comets in decades when it makes its close approach to the sun in late November. More recently, the comet has not appeared as bright as earlier models suggested it would be by now. Will it become a very bright comet later this year? Will it even be visible to the eye alone? Comets are notoriously unpredictable, and, at this point, no one can say. The animation below, also from NASA, shows the comet’s approach and departure from the inner solar system from various perspectives. More information about Comet ISON, including viewing tips.
    4
    neo
    Jeudi 22 Août 2013 à 20:09
    5
    neo
    Jeudi 22 Août 2013 à 20:16
    sur cette anim. , mettre en pause autour de JANVIER 2014 ... http://youtu.be/4D-PetAjEfM
    6
    neo
    Jeudi 22 Août 2013 à 20:18
    voir aussi au mois de mars 2014 seconde moItié anim ...
    8
    robertespierre
    Jeudi 22 Août 2013 à 21:12
    Merci Damien pour ces nouvelles d'Ison Quelle que soit sa trajectoire....nous n'y changerons rien et puis il y a tellement de place "ailleurs" Précédemment,la comète "semblait" être accompagnée....nous verrons après mi-octobre Je me demande si une observation est possible pour un objet arrivant dans l'axe de l'étoile polaire pour la même raison de luminosité Une vision à la frontière du délire et de l'humour je m'imagine regarder et voir loin,loin vraiment loin,au point de finir par voir l'arrière de ma tête Bon emménagement et bonne soirée
      • Ferlin1 Profil de Ferlin1
        Samedi 24 Août 2013 à 19:30
        Il parait qu'elle est moins brillante que prévu, mais les comètes passées ont prouvé qu'elles étaient totalement imprévisibles.... Alors attendons pour voir. Bonne soirée à toi aussi.
    9
    dvd
    Vendredi 23 Août 2013 à 00:29
    bonsoir Ferlin,ça fait longtemps que je n'ai pas fait de commentaires,meme si je visite très régulièrement. Je voudrais avoir ton avis sur deux choses. La première: il me semble que depuis un certain temps,il y a beaucoup d'objets autour du soleil(météores,astéroides?)aujourd'hui une petite sphère près du soleil à droite vers 3h. Désolé je voulais faire un copie coller mais ça marche pas,tu peux voir ce dont je parle sur SOHO EIT 304 19 08 2013 ,13:19. Est ce mon imagination,en a t-il toujours été ainsi (enfin depuis que tu observes)ou est- ce l'avant garde de ce qui arriverais derrière ISON. En clair, doit-on s'attendre à une" pluie de pierres". La deuxième: sur les graphique SDO-EVE on voit une courbe appelée "dark" est ce que tu sais à quoi cela correspond?Je te remercie de prendre sur ton temps pour me répondre.HS:je n'ai pas encore eu le temps de lire le livre que tu nous a recommandé il y a quelques temps ,j'irai l'acheter demain,si Dieu le veut. Ah oui,ou en est ton "topo" sur la question que tu nous avais posé sur l'amour? Tu l'as fini? Une dernière chose:le bruit cours sur le net qu'ISON n'aurait rien de naturel et qu'elle serait artificielle(un peu comme la comète qui aurait percutée Jupiter,il y a quelques années de cela).Crois-tu qu'il serait plausible que nos dirigeants puissent créer une sorte de fausse EMC,en vue de provoquer une série de cataclysmes planétaires pour pouvoir passer à un autre type de société(genre NOM)? J'ai vu que tu as traversé de rudes épreuves ces derniers temps,mais n'oublie pas que c'est par les nuits les plus sombres que l'on voit le plus d'étoiles...Au plaisir de te lire. Que Dieu nous protège,mais c'est Lui qui décide.
      • Ferlin1 Profil de Ferlin1
        Dimanche 25 Août 2013 à 19:11
        Salut dvd. Je le répète depuis longtemps, les sondes solaires n ont que des détecteurs de chaleur, et aucun capteur pour détecter les objets. Ce qui semble étre des objets pour certains ne sont que la chaleur ( diffuse ) d'étoile loin derrière la couronne solaire. Pour le "dark" sur la courbe SDO EVE, non, je ne sais pas et c'est la première fois que je vois ce graphique. Je vais faire des recherches dès mon retour ( Je ne suis pas chez moi ). Au plaisir. Bien à toi.
      • Ferlin1 Profil de Ferlin1
        Dimanche 25 Août 2013 à 19:23
        Jai oublié ta question sur ISON. Ils nous ont fait le même délire avec Elenin. Non, c'est une comète. Peut-être une comète comme les autres, peut-être une exceptionnelle.... Patience....
      • Ferlin1 Profil de Ferlin1
        Dimanche 25 Août 2013 à 19:29
        Pour le "dark" de SDO EVE, jai trouvé ce lien, en anglais.... http://www.usc.edu/dept/space_science/publications/PDFs/spie6689_21_5.pdf
    10
    neo
    Samedi 24 Août 2013 à 12:16
    Slt , à enregistrer ce soir et samedi prochain ... -,) Alien Theory Numéro 19 : Les armes suprêmes Genre : Découvertes Durée : 50 minutes Année de sortie : 2010 Donner votre avis Diffusion RMC Découverte Samedi 24 août 20h45 Stéréo 16:9 Tous publics Autres numéros samedi 24 août 21h35 La source du mal épisode 20 La source du mal samedi 24 août 22h20 Les pères fondateurs de l épisode 21 Les pères fondateurs de l'Amérique samedi 24 août 23h10 Aux origines de l épisode 22 Aux origines de l'homme samedi 31 août 01h40 Extrêmes contaminations épisode 17 Extrêmes contaminations samedi 31 août 20h45 Les cultes du diable épisode 23 Les cultes du diable samedi 31 août 21h30 Les secrets codés épisode 24 Les secrets codés samedi 31 août 22h15 Les survivants épisode 25 Les survivants samedi 31 août 23h00 Puissance divine épisode 26 Puissance divine
      • Ferlin1 Profil de Ferlin1
        Samedi 24 Août 2013 à 19:24
        J'ai commencé à regarder la série et j'avoue que c'est plaisant et bien fait. J'ai fini la saison 1.
    11
    neo
    Samedi 24 Août 2013 à 12:38
    http://www.maxisciences.com/%e9toile/asterosismologie-une-nouvelle-technique-utilisant-la-lumiere-fait-chanter-les-etoiles_art30554.html Une nouvelle technique de mesure de l'intensité des étoiles a permis à des chercheurs de produire des sons, qui les aident à obtenir des informations sur l'étoile. En savoir plus: http://www.maxisciences.com/%e9toile/asterosismologie-une-nouvelle-technique-utilisant-la-lumiere-fait-chanter-les-etoiles_art30554.html Copyright © Gentside Découvertes
    12
    neo
    Samedi 24 Août 2013 à 16:02
    où lorsque la réalité dépasse la fiction http://youtu.be/KUsSPKzvFo4
      • Ferlin1 Profil de Ferlin1
        Dimanche 25 Août 2013 à 19:17
        Suis encore sur l'ordi qui ne peut pas copier coller.... Snif....
    13
    neo
    Samedi 24 Août 2013 à 16:34
    http://earthsky.org/science-wire/comet-ison-to-fly-by-mars?utm_source=EarthSky+News&utm_campaign=cf535d8bd5-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-cf535d8bd5-393511181 Comet ISON to sweep closely past Mars on October 1 When Comet ISON flies by Mars, it’ll have just crossed the “frost line,” a place outside Mars’ orbit where solar heating is enough to start vaporizing ices on ISON’s surface. Around the world, astronomers are buzzing with anticipation over the approach of Comet ISON. On Thanksgiving Day 2013, the icy visitor from the outer solar system will skim the sun’s outer atmosphere. Word was that, if it survives its pass near the sun, Comet ISON might emerge as one of the brightest comets in years. Although the prospects for an extremely bright comet are not as good now as they appeared at ISON’s discovery in late 2012, still, astronomers and many others are anticipating this comet. But, before most of us on Earth see it, Comet ISON will sweep close to Mars. “Comet ISON is paying a visit to the Red Planet,” says astronomer Carey Lisse of the Johns Hopkins University Applied Physics Lab. “On Oct 1st, the comet will pass within 0.07 AU from Mars, about six times closer than it will ever come to Earth.” Mars rovers and satellites will get a close-up view. It’s too early to say whether Curiosity will be able to see the comet from the surface of Mars—that depends on how much ISON brightens between now and then. Lisse says the best bet is NASA’s Mars Reconnaissance Orbiter. The MRO satellite is equipped with a powerful half-meter telescope named HiRISE that is more than capable of detecting the comet’s atmosphere and tail. Observations are planned on four dates: August 20th, Sept 29th, and Oct 1st and 2nd. HiRISE wasn’t sent to Mars to do astronomy, notes the telescope’s principal investigator Alfred McEwen of the University of Arizona. “The camera is designed for rapid imaging of Mars. Our maximum exposure time is limited compared to detectors on other space telescopes. This is a major limitation for imaging comets. Nevertheless, I think we will detect Comet ISON.” The Mars flyby comes at a key time in Comet ISON’s journey. It will have just crossed the “frost line,” a place just outside the orbit of Mars where solar heating is enough to start vaporizing frozen water. “The volatiles in a comet are 80% to 90% water ice,” notes Lisse. “Right now in August almost all the water is still frozen, and the outgassing we see in ISON is driven by carbon dioxide and other lesser constituents. Probably only isolated patches of the comet’s nucleus are active.” But when ISON crosses the frost line, “the whole comet could erupt in geysers of gas,” says Lisse. “Mars orbiters will have a ringside seat.” The amount of outgassing at Mars will give researchers clues to the size of ISON’s nucleus, which is hidden from view deep within the comet’s dusty atmosphere. “If ISON’s nucleus is much bigger than 0.5 km, it will probably survive its Thanksgiving Day brush with the sun,” says Lisse. “It could turn into one of the most spectacular comets in many years.” McEwen sees this as a tune-up for another comet encounter next year. “The science value of observing Comet ISON is hard to predict. We’ve never tried such a thing before. However, this is good practice for Comet Siding Spring, which will pass much closer to Mars in 2014.” For now all eyes are on Comet ISON. An unprecedented number of NASA spacecraft – 16 – will be observing the comet. Astronauts on board the International Space Station will be watching, too. Meanwhile back on Earth, Lisse is working with NASA to organize a worldwide observing campaign for Comet ISON. “Our goal is to have every telescope on Earth pointed at the comet when it emerges from the sun,” says Lisse. “The Mars flyby will give us a sneak preview, providing data we need to predict what we might see.” Via NASA Comet ISON emerges from sun’s glare not as bright as hoped MORE FROM EARTH SKY Moon and three planets before sunrise August 4 Video: Comet PANSTARRS when closest to the sun March 10-15 Mars and Jupiter conjunction. Plus, hottest part of summer Everything you need to know: Delta Aquarid meteor shower Ancient snowfall likely carved Martian valleys
    14
    neo
    Samedi 24 Août 2013 à 16:35
    http://earthsky.org/earth/will-2013-break-a-record-for-arctic-sea-ice-minimum?utm_source=EarthSky+News&utm_campaign=cf535d8bd5-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-cf535d8bd5-393511181 Will 2013 break a record for Arctic sea ice minimum? Arctic sea ice extent on August 22, 2013 via NSIDC Arctic sea ice extent on August 22, 2013 via NSIDC Arctic sea ice does not appear headed toward a new minimum low in 2013. Still, the 10 lowest extents of Arctic sea ice all happened in the last 10 years. Every year for many years now, scientists and others have kept an eye on the annual Arctic sea ice minimum, which occurs when the floating Arctic ice cap melts to its smallest size of the summer. That minimum usually comes around mid-September, and, although the ice is still melting this year as of this writing (August 23, 2013), it now appears unlikely that 2013 will break a new record for the least ice observed in the Arctic. At the same time, according to NASA: … this year’s melt rates are in line with the sustained decline of the Arctic ice cover observed by NASA and other satellites over the last several decades. Even if this year ends up being the sixth- or seventh-lowest extent, what matters is that the 10 lowest extents recorded have happened during the last 10 years. The long-term trend is strongly downward. The icy cover of the Arctic Ocean was measured at 2.25 million square miles (5.83 million square kilometers) on Aug. 21. For comparison, the smallest Arctic sea ice extent on record for this date, recorded in 2012, was 1.67 million square miles (4.34 million square kilometers), and the largest recorded for this date was in 1996, when ice covered 3.16 millions square miles (8.2 million square kilometers) of the Arctic Ocean. Read more about Arctic sea ice minimum in 2013, from NASA, or watch the video below. Read more about Arctic sea ice and get updates at NSIDA's Arctic Sea Ice News and Analysis page. Read more about Arctic sea ice and get updates at NSIDA’s Arctic Sea Ice News and Analysis page. Arctic sea ice at minimum: on a downward trend. Image via the National Snow and Ice Data Center Arctic Sea Ice News and Analysis. Arctic sea ice at minimum: on a downward trend. Image via the National Snow and Ice Data Center Arctic Sea Ice News and Analysis. Bottom line: In late August 2013, Arctic sea ice is continuing to melt. It typically reaches its minimum extent for the summer in mid-September. This year, Arctic sea ice does not appear headed toward a new record for least amount of sea ice at the yearly minimum. However, the 10 lowest extents of Arctic sea ice all have happened during the last 10 years. The trend is strongly downward. MORE FROM EARTH SKY View from space: Arizona Yarnell Hill fire Beautiful day in May, in Northumberland, England | Today's Image Photos from friends: 2013 Perseid meteor shower Scientists look into Earth’s past to predict future effects of climate change Moon, planet Venus and star Regulus after sunset July 11
    15
    neo
    Samedi 24 Août 2013 à 16:35
    http://earthsky.org/tonight/constellation-cepheus-looks-like-a-house?utm_source=EarthSky+News&utm_campaign=cf535d8bd5-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-cf535d8bd5-393511181 Constellation Cepheus looks like a house 11 09aug26_430 Tonight for August 24, 2013 Moon Phase Courtesy U.S. Naval Observatory Planisphere - Northen Hemisphere Edition If you’re up before dawn on Sunday, August 25, look for the Gemini stars, Castor and Pollux, close to the dazzling planet Jupiter. Then draw an imaginary line from Castor through Pollux to locate the red planet Mars. The constellation Cepheus represents a King. It is faint, but its distinctive shape makes it easy to locate if you look in the north on August and September evenings. Tonight, be sure to look for Cepheus as soon as darkness falls, because the bright waning gibbous moon will rise by early to mid-evening tonight (Saturday, August 24). After that, the moon will continually rise later after dark for the rest of the month. What is the ecliptic? At nightfall Cepheus appears to the right or upper right of Polaris, the North Star. Then this constellation rotates around Polaris in a counter-clockwise direction during the night. It swings high over Polaris after midnight, and then sweeps to the left side of Polaris before dawn. Cepheus resembles the stick house we all drew as children – and that children today still draw – with a square for the base and a triangle for the roof. In the case of Cepheus, the tip of the roof (a star known as Gamma Cephei, or Errai) points generally northward. Star Errai: Future North Star In the sky, “northward” always means “toward the sky’s north pole,” or toward Polaris. Thus the roof of the house in Cepheus is pointing mostly north, even though – as darkness falls – that means it’s pointing sideways and downward. Sky chart of the constellation Cepheus the King The constellation Cepheus the King. Click here for a larger chart In Greek mythology, Cepheus represents a King of Ethiopia. To find Cepheus, you might want to locate a more prominent constellation, Cassiopeia the Queen. For more about Cassiopeia, see yesterday’s sky chart. Deborah Byrd MORE FROM EARTH SKY Cassiopeia the Queen points to Andromeda galaxy Moon and three planets before sunrise August 4 Coming soon: Venus/Regulus and Mars/Jupiter conjunctions Peak night for the Perseid meteor shower on August 11-12 Video: Curiosity’s first year on Mars in 2 minutes
    16
    neo
    Samedi 24 Août 2013 à 16:41
    17
    neo
    Samedi 24 Août 2013 à 16:44
    http://www.dlr.de/dlr/en/desktopdefault.aspx/tabid-10081/151_read-7899/year-2013/#gallery/11934 A satellite view of the oceans 20 August 2013 Deutsche Bucht A view from space Deutsche Bucht Elbe%2dMündung AISat Forschungsstelle Maritime Sicherheit Information 1.14 MB prev 1/4 next DLR sets up Research Centre for Maritime Safety in Bremen Gazing down from space, satellites have the best view of ice floes drifting, waves swelling restlessly, currents moving dangerously, the spread of oil slicks and the changing positions of ships. For this reason, researchers at the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR) analyse radar images or use satellites to receive ship signals. Now, DLR is pooling the research work conducted at its Remote Sensing Technology Institute and the Institute for Space Systems within the Research Centre for Maritime Safety in Bremen. DLR has set up additional research centres devoted to security on the oceans in Braunschweig, Neustrelitz and Oberpfaffenhofen. "DLR is focusing its scientific expertise within the research association Maritime Safety, meaning that the situation on the oceans can be depicted comprehensively and practically in real time," says Chairman of the DLR Executive Board Johann-Dietrich Wörner. "The results can also improve security in regions close to the coastline." Radar images from the German satellite TerraSAR-X are of utmost importance for the Bremen-based research centre, as its radar signals are able to record Earth’s surface from an altitude of over 500 kilometres, irrespective of the time of day or cloud cover. The products that DLR scientists create using the high-resolution data gathered in this way allow them to draw conclusions on the swell or wind fields out at sea. Analysis of the satellite data also enables mapping of the underwater topography. As such, data from the radar satellites is frequently combined with optical satellite images to provide users, such as government agencies and commercial enterprises, with comprehensive information. The satellite AISat is another project within the research association Maritime Safety: the Institute for Space Systems in Bremen is developing a nano-satellite fitted with a special antenna to receive AIS signals from ships. What makes the project stand out is the use of a four-metre helix antenna able to receive transponder signals in sea rescue operations, in addition to those of commercial and non-commercial ships. The satellite is scheduled for launch at the end of 2013. The research results is used to investigate questions of security concerning maritime routes, coastlines and ports. Applications include the prevention of ship collisions, monitoring the movement of icebergs and even the tracking of hijacked vessels or the detection of illegal activities such as dumping of oil or hazardous waste. Among other sources, funding for the work comes from the German Federal Ministry of Economics and Technology (BMWi) and the German states of Bavaria, Bremen, Lower Saxony and Mecklenburg-Western Pomerania.
    18
    neo
    Lundi 26 Août 2013 à 16:13
    Slt , en coup de vent : http://earthsky.org/tonight/neptune-comes-closest-to-earth-for-the-year-on-august-26?utm_source=EarthSky+News&utm_campaign=33a1f91278-EarthSky_News&utm_medium=email&utm_term=0_c643945d79-33a1f91278-393511181 attention: trad approx google... Neptune est le plus proche de la Terre pour l'année le 26 Août 12 12Aug23_430 Ce soir, le 26 Août, 2013 Phase de Lune Courtoisie US Naval Observatory Planisphère - Northen hémisphère édition Neptune est le plus proche de la Terre aujourd'hui - le 26 Août 2013 - et atteint opposition a une demi-journée un peu plus par la suite. Neptune est dit à l'opposition - l'opposé du Soleil dans le ciel de la Terre - chaque fois que notre planète Terre dans son orbite passe entre le Soleil et Neptune. Le jour de l'opposition de Neptune, Neptune lève à l'Est au coucher du soleil, monte plus haut pour la nuit aux alentours de minuit et se couche à l'ouest autour lever du soleil. Sonde Voyager 2 photo de Neptune. Crédit: NASA Mars va apparaître aussi grande que la pleine lune le 27 Août? No. L'opposition est un événement spécial. Quand une planète en dehors de l'orbite de la Terre est en opposition ou proche, la Terre se rapproche le plus de cette planète pour l'année, et cette planète, à son tour, brille plus intensément dans notre ciel. Même à l'opposition, cependant, Neptune, la huitième planète vers l'extérieur du soleil, n'est pas du tout proche et il n'est pas si clair. En fait, Neptune est la seule grande planète de sytem solaire qui n'est absolument pas visible à l'œil nu. Ce monde est environ cinq fois plus faible que le plus obscur étoiles que vous pouvez voir sur une nuit noire d'encre. Vous aurez besoin de jumelles et une carte du ciel détaillée de voir Neptune devant la constellation du Verseau, et même là, ça ne va ressembler à une étoile de faible luminosité. Neptune, la quatrième planète, est juste un peu plus petit que Uranus, la troisième plus grande. Vous n'avez pas à aligner quatre côté des terres de côté pour égaler le diamètre de chaque planète. Contrairement à Neptune, il est possible - bien que difficile - voir Uranus, la septième planète vers l'extérieur, sans aide optique. Crédit image: ESO / L. L'impression du croissant Neptune et le soleil lointain de calcada Artiste vu de Triton, la plus grande lune de Neptune Même à son plus proche, lodges Neptune façon là-bas, dans la périphérie du système solaire. Au opposition, Neptune se situe à 29 fois plus loin de la Terre que la Terre se trouve du soleil. Vous aurez toujours besoin de bonnes jumelles ou un télescope de repérer Neptune, la planète la plus éloignée du système solaire, même quand il est à son plus proche et les plus brillants pour l'année. Bruce McClure PLUS DE TERRE CIEL Soir de la pluie d'étoiles filantes des Perséides en Août 11-12 Ville ci-dessous, au-dessus de sérénité Venus-Regulus et appariements Jupiter-Mars. L'ombre de la Terre. Ceinture de Vénus Delta Aquarides météores pics de douche ce soir Prochainement: Vénus / Regulus et Mars / Jupiter conjonctions
    24
    neo
    Lundi 26 Août 2013 à 21:12
    http://www.space.com/22520-incredible-technology-mars-astronauts-suspended-animation.html?cmpid=532480 Incredible Technology: How Astronauts Could Hibernate On Mars Voyage by Mike Wall, SPACE.com Senior Writer | August 26, 2013 06:36am ET 326 100 40 Share 14 Incredibletech Artist's concept of a manned Mars spacecraft containing a stasis habitat for hibernating astronauts (in tubes at center). [Pin It] Artist's concept of a manned Mars spacecraft containing a stasis habitat for hibernating astronauts (in tubes at center). Credit: Copyright SpaceWorks Enterprises, Inc. (SEI) View full size image By the time humanity is ready to put boots on Mars, the long cruise to the Red Planet may be as easy as a dream. NASA-funded scientists are investigating ways to induce a hibernation state in astronauts. The work could help bring manned Mars missions closer to reality by making the journey to the Red Planet cheaper, safer and less taxing for crewmembers both psychologically and emotionally, researchers said. "Every year, it's, 'We're going to go to Mars in 20 or 30 years,'" said project principal investigator John Bradford, of SpaceWorks Engineering in Atlanta. "We plan to help stop that slide. This, we feel like, addresses a number of the key challenges, and maybe we can eliminate some of the technology requirements in multiple areas." [Giant Leaps: Top Milestones of Human Spaceflight] Would You Sign Up for a Years-Long Space Mission? Yes! When can we blast off? Maybe: My health upon return would have to be assured. No. Flying in space is for the brave and the bold. Not me. View Results Share This Reducing cost and risks It takes six to nine months to get to Mars using traditional propulsion technology. Keeping astronauts happy and healthy for such long stretches in deep space would be no small feat, requiring lots of food, water and other consumables, as well as relatively large living spaces that include a kitchen, sleeping quarters and exercise equipment (to mitigate bone loss, muscle atrophy and other hazards of microgravity). But when astronauts eventually take the trip, it would be significantly cheaper and safer for them to hibernate through the vast majority of it, like bears waiting out the winter, Bradford said. A Mars-bound spacecraft could be much lighter and leaner, for example, or more capable in certain vital areas. "With these mass savings, we think we can just reduce the cost, or use them to add margin to the system," Bradford told SPACE.com. "One area would be in radiation shielding," he said. Astronauts "will almost always be contained in one spot. You could significantly increase the radiation shielding over this small area and reduce the dosage they're taking over the mission." Hibernation would also lessen the psychological stress of the journey, he added. The astronauts would still be cooped up in a tiny space millions of miles from home for months at a time, but they wouldn't know it until they were awakened. Further, the strategy could lessen the need for technological breakthroughs in other areas, Bradford said. Life-support systems would not have to carry such a heavy load, for example. And with enhanced shielding around hibernating astronauts, developing a superfast new propulsion system such as nuclear fusion rockets — which NASA officials have said is a key priority to keep astronauts' radiation doses down on long flights — may not be necessary. [Gallery: Superfast Propulsion Concepts] NASA is intrigued by the possibilities hibernation presents. Bradford's group was one of 12 research teams to win a grant under Phase 1 of the NASA Innovative Advanced Concepts (NIAC) program this year. The awards, which are worth about $100,000 each and are intended to support initial analysis studies, were announced last month. Available to Populate Mars T-shirt Space.com Exclusive T-shirt. Available to Populate Mars. Buy Now Credit: Space.com Store View full size image Cooling down Bradford's team is trying to leverage and extend medical advances in therapeutic hypothermia, which seeks to prevent tissue damage during periods of low blood flow by lowering core body temperature. For every drop of 1 degree Fahrenheit in body temperature, metabolic rate decreases by 5 to 7 percent, Bradford said. The researchers are aiming for a 10-degree drop during manned Mars missions, or a 50 to 70 percent reduction in metabolic rate. That's a big drop, but it's still a far cry from the suspended animation featured in sci-fi films such as the 1979 classic "Alien," which takes body processes all the way down to zero. [6 New Sci-Fi Movies to Watch in 2013] "We're not freezing anybody. It's not cryopreservation; it's closer to hibernation," Bradford said. "So they're still breathing, and they still need sustenance." (Food and water would be delivered intravenously, he added.) Ideally, the body-temperature drop would induce an unconscious state by itself, he added, so sedatives would not have to be administered to voyaging astronauts. The team is investigating the best ways to cool an astronaut's core. The front-runner idea at the moment may be the gel pads that doctors use during hypothermia therapy, Bradford said. Injecting fluids into the bloodstream could also get the job done, but the researchers are hoping to avoid such invasive methods. It's also possible to take another tack, Bradford said: Let the Mars-bound spacecraft cool down in the frigid depths of space, but work to warm the astronauts up to the desired temperature. The longest anyone has remained in a medically induced hypothermic torpor to date is about 10 days, Bradford said. But that's likely not an upper limit, he stressed; rather, it's a reflection of the low medical need to keep people in such states for prolonged periods of time. "We're trying to give [the medical community] a need, or a rationale" to push the 10-day record out to 30 days and beyond, and to look for any possible attendant complications, Bradford said. A Sleepy Science: Will Humans Hibernate Their Way Through Space? [Pin It] An artist's concept of a crew vehicle for NASA's Human Outer Planets Exploration (HOPE) Callisto concept mission, a five-year flight for six humans, studied in 2002. ESA researchers said such a long-duration mission could warrant the use of a hibernation system for human crewmembers. Credit: NASA/RASC/LRC. View full size image Challenges ahead While long-term space hibernation could solve a number of problems, it would also pose some challenges of its own. For example, hibernating astronauts would obviously not be able to keep bone loss and muscle degeneration at bay by exercising, as crewmembers aboard the International Space Station do. The NIAC study is looking into how to mitigate this issue. One possible solution is to induce artificial gravity by spinning the spacecraft, Bradford said — a strategy that could be made even more effective by the astronauts' unresponsive state. "Typically, you have to have these very slow rotation rates, because spinning too fast makes people sick," he said. (Rotation rate dictates the magnitude of the induced gravitational force.) "Because they're not conscious, they obviously won't be susceptible to disorientation, and we think we can actually put them on a much faster rotation." The team is also looking to the animal world for ideas and inspiration. "There's a lot of research on black bears — they hibernate for five or seven months, and they experience very little muscle atrophy," Bradford said. Scientists "are trying to understand why that is. Are body processes tricking the muscles into thinking they're active? So we're looking at that." Early days As they conduct their research in this phase of the study, the researchers are looking for any possible "showstoppers" that would make hibernation impossible or impractical for astronauts on long spaceflights. If they find none, they'll apply for the next round of NIAC funding, with the aim of investigating the issue in more depth and laying out a detailed road map. At the moment, Bradford said, the strategy looks promising. He thinks it should be possible to put astronauts into a torpor state by the mid-2030s — the same timeframe NASA is targeting for its first manned Mars mission. "I don't think it's quite as far-fetched as some people may think," Bradford said. "My goal would be to have something here in 20 years, and I think a lot of the research and experimentation stuff could begin even sooner." As an example, he said that hypothermia therapy experiments could begin on the International Space Station at pretty much any time. Bradford also sees potential in the longer term, saying that the hibernation approach could make it easier to establish and sustain a permanent Mars colony. With current technology, the maximum crew size for a manned Red Planet trip is probably between four and six people, he said; beyond that, the spacecraft likely gets too big and unwieldy to launch. But the reduced needs of hibernating astronauts may make it possible to pack 10 or 20 people into a Mars-bound vessel. "If there are no problems with maintaining a stasis, we can put people on a slow boat out there," Bradford said, "and kind of ship them, almost like cargo." Follow Mike Wall on Twitter @michaeldwall and Google+. Follow us @Spacedotcom, Facebook or Google+. Originally published on SPACE.com. EDITOR'S RECOMMENDATIONS Visions of the Future of Human Spaceflight Mars Explored: Landers and Rovers Since 1971 (Infographic) Buzz Aldrin's Visions For Missions: Mars and More | Video - Part 1 YOU MIGHT ALSO LIKE Milky Way Shines Over Crater Lake in Stunning Panorama (Photo) Milky Way Shines Over Crater Lake in Stunning Panorama (Photo) Will Comet ISON Slam Into Earth? | Video Will Comet ISON Slam Into Earth? | Video Not 'Elysium,' But Better 'Ringworld' Settlements Could Return Our Future to Its Past (Commentary) Not 'Elysium,' But Better 'Ringworld' Settlements Could Return Our Future to Its Past (Commentary) Fireball Bursts 47 Miles Above Tennessee | Video Fireball Bursts 47 Miles Above Tennessee | Video
    25
    neo
    Lundi 26 Août 2013 à 21:12
    http://www.space.com/22518-astronomers-major-result-star-discovery.html?cmpid=532480 Scientists to Announce 'Major Result' from Star Study Wednesday by Clara Moskowitz, SPACE.com Assistant Managing Editor | August 26, 2013 06:30am ET 38 5 8 Share 2 The VLT “Venus” and the Belt of Venus [Pin It] Before another clear, starry night falls at ESO's Paranal Observatory, home of the Very Large Telescope (VLT), the sky produces a palette of intense colours, putting on a beautiful show for observers. Credit: ESO/José Francisco Salgado View full size image Astronomers working with the Very Large Telescope in Chile plan to announce a "major result" Wednesday (Aug. 28). The finding relates to research on medium-size stars, scientists said. The results will "shed light on a long-standing mystery about stars like our own sun," according to a statement by the European Southern Observatory, which operates the Very Large Telescope. The results come from data collected by the UVES spectrograph on the telescope. The project was led by Brazilian astronomers at the Institute of Astronomy, Geophysics, and Atmospheric Sciences at the University of São Paulo, and includes an international team of researchers. The scientists will share their discovery and discuss its implications during a press conference at 11:30 a.m. EDT (10:30 local time) at the headquarters of the Institute of Astronomy, Geophysics, and Atmospheric Sciences. Star Quiz: Test Your Stellar Smarts Though they look serene and silent from our vantage on Earth, stars are actually roiling balls of violent plasma. Test your stellar smarts with this quiz. Start the Quiz Open Star Cluster Messier 50 0 of 10 questions complete The presenters will include the following astronomers: TalaWanda R. Monroe (University of São Paulo) Jorge Meléndez (University of São Paulo) Claudio Melo (ESO) The Very Large Telescope, which began taking images in 1998, sits high above Chile's Atacama Desert on Cerro Paranal. The observatory includes four telescopes, each with a main mirror 27 feet (8.2 meters) wide, which can be used together or separately. Visit SPACE.com on Wednesday (Aug. 28) for full coverage of the announcement. Follow Clara Moskowitz on Twitter and Google+. Follow us @Spacedotcom, Facebook and Google+. Original article on SPACE.com. EDITOR'S RECOMMENDATIONS 10 Space Discoveries by the European Southern Observatory Europe's Very Large Telescope's Greatest Hits | Video Spectacular Cosmic Visions from ESO's Paranal Observatory (Gallery) YOU MIGHT ALSO LIKE Best Space Photos of the Week - Aug. 3, 2013 Best Space Photos of the Week - Aug. 3, 2013 One-Way Mars Trip: Aspiring Martian Colonists Land In Washington One-Way Mars Trip: Aspiring Martian Colonists Land In Washington NASA Maps Dangerous Asteroids That May Threaten Earth (Photos) NASA Maps Dangerous Asteroids That May Threaten Earth (Photos) NASA Moon Dust Probe Ready to Launch from Virginia Coast NASA Moon Dust Probe Ready to Launch from Virginia Coast
    26
    neo
    Lundi 26 Août 2013 à 21:13
    http://www.space.com/22448-alien-life-search-laser-signals.html?cmpid=532480 Hunt for Intelligent Aliens Focuses on Faint Laser Flashes by Charles Q. Choi, SPACE.com Contributor | August 20, 2013 03:50pm ET 75 30 15 Share 6 Astro The Comet and the Laser [Pin It] ESO’s Very Large Telescope (VLT) tested a new laser for the VLT on Feb. 14, 2013. To the right of the centre of the image, just below the Small Magellanic Cloud, streaks comet Lemmon. Credit: G.Hüdepohl (atacamaphoto.com)/ESO View full size image When it comes to detecting laser pulses aliens might shoot at Earth to attract our attention, scientists now find they can detect signals as faint as a single photon of light every few tiny fractions of a second. Astronomers have gazed at the skies for decades searching for signs of extraterrestrial intelligence. Lasers can in principle help transmit messages over extraordinary distances, but while scientists have monitored a large number of stars looking for alien laser signals — for instance, facilities at Harvard and Princeton scanned more than 10,000 sun-like stars for several years — no evidence for any have been found yet. Prior attempts to look for extraterrestrial laser signals concentrated on isolated bursts of light, ones so extraordinarily intense they are likely artificial. In contrast, laser scientist Walter Leeb at the Vienna University of Technology in Austria and his colleagues are focusing on repetitive, faint laser signals received over a sufficiently long amount of time. [13 Ways to Hunt Intelligent Aliens] "We assumed that aliens would use the simplest possible way of attracting our attention, one already implemented in seafaring since ancient times using lighthouses — that is, periodic light pulses," Leeb said. The kinds of strings of pulses the researchers are looking for, each roughly nanoseconds or billionths of a second long, are not likely found in nature. "Such signals can, however, be generated by lasers," Leeb said, thus hinting at an extraterrestrial intelligent origin. The advantage of a repetitious signal is that it can readily be distinguished from random noise, even if a large portion of transmitted pulses are lost before they are received. Leeb did note that astronomical objects known as pulsars also give off repetitive light pulses. "However, their signals have a rather low repetition frequency, and do not consist of nanosecond pulses an extraterrestrial intelligence will possibly use," he said. Since current technology on Earth is capable of powerful visible and near-infrared lasers, the scientists assumed extraterrestrials might be as well. They reasoned aliens would choose wavelengths that would stand out from the light from their home stars as well. Although Leeb and his colleagues assumed that aliens would use high-energy lasers to fire these pulses, they also reasoned the vast distances these signals traveled means these pulses might be very faint by the time they reached Earth. As such, their strategy employs devices known as single-photon detectors, which as their name implies can detect signals even as dim as a single photon, the particle making up light. "We are designing a detection system for an unknown and at the same time most likely very faint optical signal — a formidable task indeed," Leeb said. [5 Bold Claims of Alien Life] In a lab test of their strategy, the researchers simulated an extraterrestrial laser signal with 10,000 near-infrared pulses per second from an exoplanet orbiting a sun-like star 500 light-years away. Assuming a receiver 5.5 feet (1.7 meters) wide and a transmitter about 33 feet (10 m) in diameter with a 42-kilojoule laser — one potentially technically within reach of modern technology — Leeb and his colleagues found their technique was capable of clearly detecting as little as one photon on average per pulse. Leeb hopes the simplicity of this method will spur other groups to use this method "when searching for signals sent by extraterrestrial intelligence. This will increase the chance to provide evidence that we are not alone." The researchers have already begun trying out their method on distant stars with the 80-centimeter telescope at the University of Vienna, targeting a number of recently detected alien planets that supposedly lie within the habitable zones of their host stars — the areas where that star's light makes temperatures just right for keeping oceans of liquid water on the surfaces of those planets. "Examples were Kepler-22b, HD 33564b, HD 87883b and the exoplanets of Gliese 581," Leeb said. They plan a more systematic survey as soon as they have improved the pointing and tracking accuracy of their telescope. Leeb cautioned, "We have yet not actually received the signals for which we have designed our method." "They show that current detector technology can detect individual photons and process their arrival times to sense the expected faint illumination from even a distant alien transmitter," said astronomer Geoffrey Marcy at the University of California, Berkeley, who did not take part in this study. "The key now is to implement their SETI technique on a large telescope having a mirror of diameter 1 to 3 meters (3 to 10 feet) to begin searching for periodic laser transmissions." Space instrumentation engineer Felix Hormuth at the Max Planck Institute for Astronomy in Heidelberg, Germany, who did not participate in this study, said this latest work showed "a very clear, sound, and technically proven way" to help discover alien signals, and was suitable "for deployment at many of the small- to mid-sized telescopes becoming less and less used in the times of extremely large telescopes. “It is not science fiction, but a reasonable approach with the right amount of boldness to be both fascinating and realistic," Hormuth said. The scientists detailed their findings in the June issue of the journal Astrobiology This story was provided by Astrobiology Magazine, a web-based publication sponsored by the NASA astrobiology program. Follow us @Spacedotcom, Facebook or Google+. Published on SPACE.com. EDITOR'S RECOMMENDATIONS 6 Most Likely Places for Alien Life in the Solar System Ten Alien Encounters Debunked Scientists Hunt For Light Flashes From Extraterrestrial Civilizations YOU MIGHT ALSO LIKE
    27
    neo
    Lundi 26 Août 2013 à 21:20
    Comment la NASA compte capturer et étudier un astéroïde http://www.maxisciences.com/ast%e9ro%efde/comment-la-nasa-compte-capturer-et-etudier-un-asteroide_art30577.html La NASA a dévoilé des photos et une vidéo montrant comment elle compte procéder pour capturer un astéroïde géocroiseur, l'étudier et en prélever des échantillons. En savoir plus: http://www.maxisciences.com/ast%e9ro%efde/comment-la-nasa-compte-capturer-et-etudier-un-asteroide_art30577.html Ce n'est plus un secret : les astéroïdes constituent pour la NASA un objectif majeur d'exploration. Depuis plusieurs années, l'agence spatiale s'intéresse de près à ces objets rocheux et irréguliers errants dans l'espace et pas seulement pour surveiller ceux qui pourraient présenter un danger pour la Terre. L'objectif est en réalité d'en savoir plus sur la composition des astéroïdes pour peut-être parvenir à en apprendre davantage sur l'histoire de notre Système solaire. Pour cela, l'agence a évoqué depuis longtemps la possibilité d'envoyer des hommes s'approcher d'un astéroïde géocroiseur afin de l'étudier de près et d'en ramener des échantillons. Mais depuis quelques années, elle nourrit aussi un autre projet plus imaginatif : capturer l'un de ces objets pour le rapprocher de la Terre et le placer en orbite lunaire. Dans ce but, la NASA a imaginé la conception d'un vaisseau qui incorporerait un grand sac capable de piéger un astéroïde puis de le tirer plus près de la Terre. Et c'est là que la chose devient réellement intéressante. En effet, alors que l'agence s'était contentée d'exposer son projet, elle l'a dévoilé avec davantage de détails grâce à des photos et une vidéo d'animation. En un peu plus de 3 minutes 30, la séquence montre étape par étape ce à quoi ont pensé les chercheurs de la NASA. Rendez-vous avec un astéroïde captif Selon la vidéo, l'équipage de cette mission baptisée "Asteroid Redirect Mission" serait composé de deux astronautes qui décollerait à bord de la capsule Orion grâce à une fusée. Une fois arrivé à une altitude suffisante, le lanceur libèrerait la capsule qui entamerait alors un voyage de neuf jours dans l'espace en direction de l'astéroïde déjà capturé et maintenu captif par un engin équipé de panneaux solaires. Afin de gagner en vitesse, la capsule et son équipage ferait un tour autour de la Lune, profitant ainsi de la gravité du satellite afin de rejoindre l'astéroïde. Viendrait alors le moment du rendez-vous pour Orion qui irait s'arrimer à l'engin piégeur. Une fois la capsule fixée, les astronautes manœuvreraient pour placer l'engin dans la bonne position et faciliter la sortie extra-véhiculaire. La trappe serait ensuite ouverte et les deux explorateurs équipés de leur combinaison se rapprocheraient du sac où l'astéroïde large de plusieurs mètres serait piégé. Au passage, ils récupèreraient les outils nécessaires puis entameraient les choses sérieuses en réalisant une brèche dans le sac. D'après la vidéo, les opérations consisteraient notamment à prendre l'astéroïde en photo et collecter plusieurs échantillons précieusement gardés. Six jours d'étude et un splash dans l'océan Au total, ceci représenterait environ six jours d'exploration si l'on en croit les explications. Une fois toutes ces étapes complétées, les deux astronautes regagneraient définitivement leur capsule pour reprendre le chemin vers la Terre après s'être désarrimés de l'engin piégeur. Il faudrait environ dix jours et un autre passage autour de la Lune pour regagner notre planète. Arrivée dans l'atmosphère terrestre, la capsule déploierait ses parachutes avant de finir sa course dans l'océan. Là, les équipes s'empresseraient d'aller à la rencontre des astronautes et de leur précieux chargement. Les échantillons seraient alors étudiés de près afin de percer les secrets de l'astéroïde qui pourrait contenir plusieurs centaines de tonnes d'eau, de carbone, de métaux et de silicates. Une mission à préciser La mission semble plutôt convaincante à voir la vidéo de la NASA qui n'a d'ailleurs pas hésité à y ajouter une musique digne d'un film hollywoodien. Néanmoins, la séquence suffit également à soulever de nombreuses questions et notamment ce qu'il adviendra de l'astéroïde capturé une fois la mission terminée. Sera t-il relâché ? Si la réponse est oui, sa trajectoire ayant été perturbée par la capture, qu'adviendra t-il de lui ? Ne représentera t-il pas un danger pour la Terre ou un autre corps ? La mission reste donc largement à préciser. Selon l'annonce faite en avril dernier, la NASA a prévu un budget de 100 millions de dollars pour financer cette mission qui devrait être peaufinée à l'horizon 2014. Pour l'heure, l'agence examine les multiples idées, concepts et alternatives proposés pour chaque phase de la mission par l'industrie, les universités et le public. Fin septembre, elle tiendra un grand atelier au Lunar and Planetary Institute de Houston afin de discuter de chacune de ces idées et de la possibilité de les intégrer ou non à la mission. La NASA espère d'ores et déjà pourvoir capturer son premier astéroïde vers 2025. A terme, ceci pourrait également ouvrir la voie à une autre mission où cette fois-ci, des astronautes iraient se poser sur un corps plus lointain pour l'étudier. Les photos de la mission sont visibles sur le site de la NASA. Top vidéo ISS : l'OVNI filmé par l'astronaute Chris Cassidy n'était qu'un couvercle de protection ! Suivre Astéroïde Astéroïde : les premières images de 1998 QE2 dévoilées par la NASA - Vidéo Astéroïde : la NASA lance la chasse aux objets susceptibles de menacer la Terre La NASA observe un trou coronal à la surface du Soleil - Vidéo Mars : la NASA lancera une nouvelle mission en 2020 à la recherche de traces de vie - Vidéo Astéroïde : les astronomes découvrent le 10 000e objet géocroiseur connu, 2013 MZ5 Vos réactions : Juniper Juniper - on le savait déjà depuis quelques temps, ils veulent même le mettre en orbite lunaire 13h57 Spidey Spidey - cela promet des découvertes passionnantes 17h19 Supernovazaz Supernovazaz - dangereux projet mais jolie animation ! 17h43 Fournela Fournela - au point de lagrange serait mieux.. En savoir plus: http://www.maxisciences.com/ast%e9ro%efde/comment-la-nasa-compte-capturer-et-etudier-un-asteroide_art30577.html Copyright © Gentside Découvertes
    28
    slc
    Mardi 27 Août 2013 à 11:37
    slt, je ne sais pas si tu as vu mais www.solarsystemscope.com a fait une animation cc la venue de ISON, comme d'habitude c'est du très beau travail ! Je ne me lasse pas d'aller sur ce site et de naviguer avec ma souris, la 3D est magique quand on adore l'espace. Bonne journée @+, slc
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