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Vénus, la Terre et Mars sont réunies sont un seul cliché saisissant de Solar Orbiter
Nelly Lesage • news.movim.eu / Numerama • 27 January, 2021
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L'article Vénus, la Terre et Mars sont réunies sont un seul cliché saisissant de Solar Orbiter est apparu en premier sur Numerama .
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NASA’s Space Launch System rocket shuts down after just 67 seconds
Eric Berger • news.movim.eu / ArsTechnica • 17 January, 2021
At 4:27pm central time, the SLS rocket core stage ignited its four RS-25 engines at NASA's Stennis Space Center. The test was to last up to eight minutes. [credit: Trevor Mahlmann for Ars ]
STENNIS SPACE CENTER, Miss.—For a few moments, it seemed like the Space Launch System saga might have a happy ending. Beneath brilliant blue skies late on Saturday afternoon, NASA’s huge rocket roared to life for the very first time. As its four engines lit, and thrummed, thunder rumbled across these Mississippi lowlands. A giant, beautiful plume of white exhaust billowed away from the test stand.
It was all pretty damn glorious until it stopped suddenly.
About 50 seconds into what was supposed to be an 8-minute test firing, the flight control center called out, “We did get an MCF on Engine 4.” This means there was a “major component failure” with the fourth engine on the vehicle. After a total of about 67 seconds, the hot fire test ended.
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NASA extends missions to Jupiter and Mars—expect lots of Jovian moon flybys
Eric Berger • news.movim.eu / ArsTechnica • 11 January, 2021
Enlarge / NASA’s Juno spacecraft soared directly over Jupiter’s south pole when JunoCam acquired this image on February 2, 2017. (credit: NASA/JPL-Caltech/SwRI/MSSS/John Landino)
NASA has announced that it will extend the missions for two of its interplanetary explorers launching during the last decade—the Juno spacecraft orbiting Jupiter and the InSight lander on the surface of Mars.
The Juno extension means the spacecraft will now operate in the Jovian system through 2025. This will effectively transform the spacecraft from a mission to study Jupiter into a full-fledged Jovian system explorer, complete with close flybys of several of Jupiter's moons as well as its system of rings.
Back in the inner Solar System on the surface of Mars, the InSight mission will now run through December 2022. During these additional two years, the lander will continue to operate its seismometer to identify Marsquakes, as well as continue to collect detailed information about weather at the surface.
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La NASA prépare un test décisif en vue de son retour sur la Lune
Julien Lausson • news.movim.eu / Numerama • 8 January, 2021
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L'article La NASA prépare un test décisif en vue de son retour sur la Lune est apparu en premier sur Numerama .
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Quelle est cette grosse tache sombre sur Neptune ?
Nelly Lesage • news.movim.eu / Numerama • 16 December, 2020
Voitures, vélos, scooters... : la mobilité de demain se lit sur Vroom ! https://www.numerama.com/vroom/vroom//
L'article Quelle est cette grosse tache sombre sur Neptune ? est apparu en premier sur Numerama .
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Cette exoplanète à l’orbite surprenante pourrait aider à chercher la Planète 9
Nelly Lesage • news.movim.eu / Numerama • 11 December, 2020
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L'article Cette exoplanète à l’orbite surprenante pourrait aider à chercher la Planète 9 est apparu en premier sur Numerama .
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Vol inhabité de Boeing vers l’ISS : après le dernier échec, rendez-vous le 29 mars 2021
Julien Lausson • news.movim.eu / Numerama • 10 December, 2020
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L'article Vol inhabité de Boeing vers l’ISS : après le dernier échec, rendez-vous le 29 mars 2021 est apparu en premier sur Numerama .
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Les prochains astronautes qui iront sur la Lune sont sûrement dans cette liste
Nelly Lesage • news.movim.eu / Numerama • 10 December, 2020
Voitures, vélos, scooters... : la mobilité de demain se lit sur Vroom ! https://www.numerama.com/vroom/vroom//
L'article Les prochains astronautes qui iront sur la Lune sont sûrement dans cette liste est apparu en premier sur Numerama .
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A piece of NASA history has re-entered Earth’s orbit after 54 years
Jennifer Ouellette • news.movim.eu / ArsTechnica • 8 December, 2020 • 1 minute
Enlarge / An Atlas-Centaur rocket booster being assembled at a General Dynamics plant, circa 1962. (credit: NASA )
Fifty-four years ago, NASA launched the Surveyor 2 , an uncrewed mission to explore the surface of the Moon. Alas, the spacecraft went into a tumble en route after a failed course-correction burn, and it slammed into the lunar surface at 2.7 kilometers per second. But the rocket booster used during its launch followed a different trajectory into space and has now begun orbiting the Earth. That's the conclusion of astronomers who have been studying 2020 SO, an unusual object first spotted this past August.
NASA's Surveyor program was designed to demonstrate the feasibility of launching, communicating with, controlling, and landing an uncrewed spacecraft on the Moon, thereby paving the way for later crewed missions. Surveyor 1 , launched on May 30, 1966, was a resounding success, easily meeting its primary objectives, while also returning many images of the lunar surface and critical engineering data. So NASA's hopes were high for building on that success with the second mission. The intent was to land Surveyor 2 on the Moon just east of its predecessor to demonstrate the feasibility of an oblique approach and landing.
After a series of minor delays, Surveyor 2 launched successfully on September 20, 1966, at 7:31:59.8 EST. The launch vehicle was an Atlas-Centaur rocket using liquid hydrogen and liquid oxygen as propellants. Once the Centaur's engines were shut down and the spacecraft had coasted for 66 seconds, Surveyor 2 departed from spent Centaur. The rocket expelled its residual propellants to set a safe distance between itself and the Surveyor 2, giving it a trajectory that would miss the Moon by a good 5,675 kilometers and send the rocket into a solar orbit. That Centaur rocket is what astronomers have confirmed to be 2020 SO.
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