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With a small side project, astronomers discover a new type of galaxy.
Yesterday, word came that even the 100-200 billion figure would have to be revised. Christopher Conselice, an astrophysicist at the University of Nottingham, in the United Kingdom, and a team of international colleagues, found that, after poring through deep space images from Hubble and other telescopes, and converting them into a three-dimensional model, there had to be at least ten times more galaxies than thoughtโso, at least a trillion. This figure, he and his colleagues write in their paper, โdivulges information about the mass density of the universe, background light at various wavelengths, as well as insights into Olbersโ Paradox.โ
Hubert Reeves rend hommage ร une รฉquipe de physiciens du CNRS, basรฉe ร Orsay et dirigรฉe par Renรฉ Bernas, qui a jouรฉ dans les annรฉes 1960 un rรดle majeur mais mรฉconnu dans la thรฉorie du Big Bang.
The purpose of this web site is to act as a community knowledge base for performing astronomy research with Python. It provides a variety of tutorials, code snippets, resources, lists of useful packages, general discussion, advice and also features news items, event information and announcements.
Official SpaceX Photos
Had you searched the sky with a telescope just a few hundred thousand years ago, you would have struggled to find a red planet. Instead, you would have seen a gleaming-white ice ball whereย Mars should be. A team of astronomers led by Isaac Smith, an astrophysicist at the Southwest Research Institute in Boulder, Colorado, has collected the first concrete evidence that Mars has just exited an extreme ice age, one so intense it would have put Earth's recent frosty foray to shame.ย
La sonde europรฉenneย Venus Express a fini sa mission ร l'รฉtรฉ 2014 quand elle fut ร cours de carburant. Juste avant d'รชtre envoyรฉe dans l'atmosphรจre de Vรฉnus pour y brรปler, elle a fourni des derniรจres donnรฉes inรฉdites sur l'atmosphรจre vรฉnusienne.
En dรฉcembre dernier, les ingรฉnieurs japonais de la JAXA parvenaient ร mettre enfin leur sonde Akatsuki en orbite de Vรฉnus aprรจs 5 ans d'errance dans le systรจme solaire. La semaine derniรจre, ses premiers rรฉsultats ont รฉtรฉ prรฉsentรฉs ร la confรฉrence International Venus Conference ayant lieu ร Oxford. On y dรฉcouvre notamment dans l'atmosphรจre vรฉnusienne des nuages acides striรฉs ainsi qu'une forme mystรฉrieuse mouvante en forme d'arc.
The brilliant flash of an exploding starโs shockwaveโwhat astronomers call the โshock breakoutโ -- is illustrated in this cartoon animation. The animation begins with a view of a red supergiant star that is 500 times bigger and 20,000 brighter than our sun. When the starโs internal furnace can no longer sustain nuclear fusion its core to collapses under gravity. A shockwave from the implosion rushes upward through the starโs layers. The shockwave initially breaks through the starโs visible surface as a series of finger-like plasma jets. Only 20 minute later the full fury of the shockwave reaches the surface and the doomed star blasts apart as a supernova explosion. This animation is based on photometric observations made by NASAโs Kepler space telescope. By closely monitoring the star KSN 2011d, located 1.2 billion light-years away, Kepler caught the onset of the early flash and subsequent explosion.