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Hubble revisite les restes flamboyants d’une étoile après sa mort violente
news.movim.eu / JournalDuGeek · Wednesday, 7 December, 2022 - 09:30
Grâce au vénérable télescope, les astronomes espèrent percer les secrets d'un rémanent de supernova unique en son genre.
Hubble revisite les restes flamboyants d’une étoile après sa mort violente
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On a vu un trou noir déchirer une étoile à 8,5 milliards d’années-lumière de nous
news.movim.eu / Numerama · Wednesday, 30 November, 2022 - 16:00
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Post-impact images of DART mission have not disappointed
news.movim.eu / ArsTechnica · Friday, 7 October, 2022 - 21:56
Enlarge / Nailed the landing. (credit: NASA, ESA, CSA )
At a press conference shortly before NASA's Double Asteroid Redirection Test (DART) spacecraft smashed into an asteroid, a reporter tried to get a sense of just what would happen as a bunch of metal and electronics smashed into a pile of rubble left over from the birth of the Solar System. "Give us a sense of this combat between our spacecraft and this rock," the reporter asked a scientist at the Applied Physics Lab.
"The spacecraft's going to lose," APL's Nancy Chabot quipped back.
The amazing thing about that loss is that we got to experience it in real time, as the last image from DART's onboard camera cut out after only a small fraction of it was transmitted to Earth.
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Le crash de DART sur l’astéroïde a été vu simultanément par James Webb et Hubble
news.movim.eu / Numerama · Saturday, 1 October, 2022 - 10:31
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La Nasa et SpaceX ont un plan pour aider Hubble
news.movim.eu / Numerama · Friday, 30 September, 2022 - 10:30
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NASA and SpaceX are studying a Hubble telescope boost, adding 15 to 20 years of life
news.movim.eu / ArsTechnica · Thursday, 29 September, 2022 - 22:45 · 1 minute
Enlarge / The crew of Polaris Dawn, from left: Scott Poteet, Jared Isaacman, Sarah Gillis, and Anna Menon, pose in front of SpaceX's Super Heavy rocket in South Texas. (credit: John Kraus/Polaris Program)
NASA announced Thursday that it plans to study the possibility of using SpaceX's Crew Dragon vehicle to boost the aging Hubble Space Telescope into a higher orbit.
The federal agency has signed a "Space Act Agreement" with SpaceX to conduct a six-month study to determine the practicability of Dragon docking with the 32-year-old telescope and boosting it into a higher orbit. The study is not exclusive, meaning that other companies can propose similar concepts with alternative rockets and spacecraft.
The agreement comes after SpaceX and the Polaris Program—a series of private missions self-funded by billionaire Jared Isaacman—approached NASA about potential servicing missions including the Hubble Space Telescope. Isaacman is the first private citizen to command an orbital spaceflight, when he led a crew of four aboard SpaceX's Dragon in 2021 on the Inspiration4 mission . With Polaris he is seeking to push the boundaries of private space exploration outward. The first Polaris mission is scheduled for March 2022 on Dragon, and will fly to an altitude of 750 km while also conducting the first private spacewalks.
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L’étoile Bételgeuse continue de se comporter étrangement : son intérieur « rebondit »
news.movim.eu / Numerama · Friday, 12 August, 2022 - 12:22
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Regardez les étoiles danser dans ces images de Hubble et James Webb séparées par 27 ans
news.movim.eu / Numerama · Monday, 8 August, 2022 - 12:08
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NASA’s new toy may have already spotted the oldest known galaxy
news.movim.eu / ArsTechnica · Friday, 22 July, 2022 - 21:02 · 1 minute
Enlarge / The two newly imaged galaxies, with the older one at right. (credit: Naidu, et. all. )
One of the design goals for the James Webb Space Telescope was to provide the ability to image at wavelengths that would reveal the Universe's first stars and galaxies. Now, just a few weeks after its first images were revealed, we're getting a strong indication that it's a success. In some of the data NASA has made public, researchers have spotted as many as five galaxies from the distant Universe, already present just a few hundred million years after the Big Bang. If confirmed to be as distant as they appear, one of them will be the most distant galaxy yet observed.
For many of its observatories, NASA allows astronomers to submit proposals for observation and allows those users to have exclusive access to the resulting data for a time afterward. But for its newest instrument, NASA has a set of targets where the data will be made public immediately, for anyone to analyze as they wish. Some of these include locations similar to one of the first images released , where a large cluster of galaxies in the foreground acts as a lens to magnify more distant objects.
(You can look at the details of one of the datasets used for this analysis , called GLASS, which used the cluster Abell 2744 to magnify distant objects, which were urther magnified by the telescope.)
