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Reçu hier — 22 mai 2025

Wisk Aero, NASA Sign 5-Year Partnership To Advance Sustainable Autonomous Flights

Par :BeauHD
22 mai 2025 à 10:00
Wisk Aero and NASA have signed a new five-year partnership to advance the safe integration of autonomous, all-electric aircraft into U.S. airspace, focusing on urban air mobility and regulated eVTOL flight. Electrek reports: Wisk Aero shared details of its refreshed partnership with NASA this week. The autonomous aviation specialist has signed a new five-year Non-Reimbursable Space Act Agreement (NRSAA) with the renowned space administration. Per Wisk, this new agreement focuses on critical research led by NASA's Air Traffic Management Exploration (ATM-X) project, which is centered around the advancement of commercialized autonomous aircraft travel under Instrument Flight Rules (IFR) in the National Airspace System (NAS). As a specialist in autonomous, zero-emission aircraft, Wisk intends to continue its research alongside NASA to help regulators determine future eVTOL flight procedures and capabilities in the US. Regulatory developments on the to-do list for the latest NRSAA include optimizing airspace and route designs for highly automated UAM operations, establishing critical aircraft and ground-based safety system requirements for autonomous flight in urban environments, and establishing Air Traffic Control (ATC) communication protocols and procedures for seamless integration of future UAM aircraft. To achieve these goals, Wisk said its research with NASA will more specifically focus on utilizing advanced simulation and Live Virtual Constructive (LVC) flight environments, which combine live flights with a simulated airspace to enable researchers to assess future operations. The teams from Wisk and NASA already met last month, continuing their research while beginning to determine how instrument flight procedures and advanced technologies can work together to enable safe autonomous passenger flights by 2030. Wisk Aero is a wholly owned subsidiary of Boeing based in California. The aerospace manufacturer said last year that it expects its pilotless air-taxi to begin carrying passengers "later in the decade."

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26 bactéries inconnues découvertes dans une salle blanche de la Nasa

Mais comment ces bactéries ont-elles pu survivre aux conditions difficiles d'une salle blanche de la Nasa ? Ce questionnement fascine les scientifiques, dans cette nouvelle étude dédiée aux extrémophiles.

Reçu avant avant-hier

Des aurores boréales… sur Mars ?

15 mai 2025 à 14:40

Le 14 mai 2025, des scientifiques ont publié une étude révélant que le rover Perseverance a détecté des aurores boréales sur Mars. C'est la première fois que ce phénomène se produit en lumière visible et qu'il est observé depuis la surface de la planète rouge.

La Maison-Blanche cible les astronautes de l’ISS, qui n’a plus d’intérêt à ses yeux

5 mai 2025 à 16:19

La Maison-Blanche voudrait économiser sur la Station spatiale internationale (ISS), en retirant plus de 500 millions d'euros de la NASA, dans le budget 2026 consacré à cette mission. Cela pourrait avoir une incidence sur la taille des équipages, leur rotation ainsi que la durée des séjours et les activités à bord.

Trump veut tuer la station lunaire internationale Gateway et la fusée SLS en 2026

3 mai 2025 à 08:11

Dans sa proposition de budget pour les États-Unis, la Maison-Blanche de Donald Trump a fait de nombreuses propositions pour la Nasa. Les recherches environnementales et météorologiques prennent un coup, mais le programme Artémis est aussi ciblé : la station lunaire internationale Gateway pourrait être tout simplement annulée.

NASA's SPHEREx Space Telescope Begins Capturing Entire Sky

Par :BeauHD
2 mai 2025 à 07:00
NASA's SPHEREx space observatory has officially begun its two-year mission to map the entire sky in 102 infrared wavelengths, capturing about 3,600 images daily to create 3D maps of hundreds of millions of galaxies. Its goal is to unlock new insights into cosmic inflation, the origins of galaxies, and the building blocks of life in the Milky Way by using spectroscopy to analyze light and matter across the universe. From a press release: From its perch in Earth orbit, SPHEREx peers into the darkness, pointing away from the planet and the Sun. The observatory will complete more than 11,000 orbits over its 25 months of planned survey operations, circling Earth about 14.5 times a day. It orbits Earth from north to south, passing over the poles, and each day it takes images along one circular strip of the sky. As the days pass and the planet moves around the Sun, SPHEREx's field of view shifts as well so that after six months, the observatory will have looked out into space in every direction. When SPHEREx takes a picture of the sky, the light is sent to six detectors that each produces a unique image capturing different wavelengths of light. These groups of six images are called an exposure, and SPHEREx takes about 600 exposures per day. When it's done with one exposure, the whole observatory shifts position -- the mirrors and detectors don't move as they do on some other telescopes. Rather than using thrusters, SPHEREx relies on a system of reaction wheels, which spin inside the spacecraft to control its orientation. Hundreds of thousands of SPHEREx's images will be digitally woven together to create four all-sky maps in two years. By mapping the entire sky, the mission will provide new insights about what happened in the first fraction of a second after the big bang. In that brief instant, an event called cosmic inflation caused the universe to expand a trillion-trillionfold.

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Cette photo de Curiosity prise depuis l’orbite de Mars est unique

26 avril 2025 à 08:03

Le rover Curiosity de la Nasa apparaît dans une nouvelle image prise depuis l'orbite de Mars. C'est la première fois qu'un orbiteur martien de l'agence spatiale parvient à capturer le robot en train de rouler sur la planète rouge.

Hubble Celebrates 35th Year In Orbit

Par :BeauHD
24 avril 2025 à 10:00
To celebrate the Hubble Space Telescope's 35th anniversary in orbit, NASA and ESA released a series of new, out-out-of-this-world images spanning planets, nebulae, and galaxies. From a press release: Hubble today is at the peak of its scientific return thanks to the dedication, perseverance and skills of engineers, scientists and mission operators. Astronaut shuttle crews gallantly chased and rendezvoused with Hubble on five servicing missions from 1993 to 2009. The astronauts, including ESA astronauts on two of the servicing missions, upgraded Hubble's cameras, computers and other support systems. By extending Hubble's operational life the telescope has made nearly 1.7 million observations, looking at approximately 55,000 astronomical targets. Hubble discoveries have resulted in over 22,000 papers and over 1.3 million citations as of February 2025. All the data collected by Hubble is archived and currently adds up to over 400 terabytes. The demand for observing time remains very high with 6:1 oversubscriptions, making it one of the most in-demand observatories today. Hubble's long operational life has allowed astronomers to see astronomical changes spanning over three decades: seasonal variability on the planets in our solar system, black hole jets traveling at nearly the speed of light, stellar convulsions, asteroid collisions, expanding supernova bubbles, and much more.

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NASA's Oldest Astronaut Celebrates 70th Birthday With Return To Earth

Par :BeauHD
22 avril 2025 à 07:00
NASA's oldest active astronaut, Don Pettit, celebrated his 70th birthday by returning to Earth after a seven-month mission aboard the ISS. The Guardian reports: A Soyuz capsule carrying the American and two Russian cosmonauts landed in Kazakhstan on Sunday, Pettit's birthday. "Today at 0420 Moscow time (0120 GMT), the Soyuz MS-26 landing craft with Alexei Ovchinin, Ivan Vagner and Donald (Don) Pettit aboard landed near the Kazakh town of Zhezkazgan," Russia's space agency Roscosmos said. Spending 220 days in space, Pettit, Ovchinin and Vagner orbited the Earth 3,520 times and completed a journey of 93.3m miles over the course of their mission. It was the fourth spaceflight for Pettit, who has logged more than 18 months in orbit during his 29-year career. Nasa said in a statement that Pettit was "doing well and in the range of what is expected for him following return to Earth." A recording of the touchdown can be viewed here. Earlier this year, Pettit managed to take one of the best photos ever captured from space. "When I first saw it, I was dazzled by its beauty," wrote Ars Technica's Eric Berger. "But when I looked further into the image, there were just so many amazing details to be found." "In this image, one can see the core of the Milky Way galaxy, zodiacal light (sunlight diffused by interplanetary dust), streaks of SpaceX Starlink satellites, individual stars, an edge-on view of the atmosphere that appears in burnt umber due to hydroxide emissions, a near-sunrise just over the horizon, and nighttime cities appearing as streaks."

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La clé du voyage dans l’espace ? Les fusées nucléaires, selon le patron de la Nasa

10 avril 2025 à 14:27

Nasa fusée nucléaire

Auditionné pour le poste d'administrateur de l'agence spatiale américaine (Nasa), Jared Isaacman a balayé plusieurs sujets devant le Sénat. Il a notamment souligné l'importance qu'il accorderait à la propulsion nucléaire pour l'exploration spatiale.

Le futur patron de la Nasa calme le jeu avec Mars : il y a une mission bien plus urgente

8 avril 2025 à 14:01

jared isaacman

Le prochain patron de la Nasa a rappelé que la priorité immédiate de l'agence spatiale n'est pas les voyages habités vers Mars. Malgré les déclarations d'Elon Musk ou de Donald Trump, la priorité est ailleurs.

Pourquoi il faut aller récupérer le plus vieux satellite de la Terre

7 avril 2025 à 14:34

Un groupe d'ingénieurs et d'historiens propose un projet surprenant : récupérer Vanguard 1 et le ramener sur Terre. Il s'agit du plus vieux satellite encore en orbite terrestre. Il avait été lancé dans l'espace en 1958.

« J’y retournerai en un clin d’œil » : les 2 astronautes de l’ISS referaient le voyage dans le Starliner s’il le fallait

1 avril 2025 à 09:27

sunita williams barry wilmore

Rentrés en mars 2025, les astronautes de la NASA Sunita Williams et Barry Wilmore ont donné une conférence de presse le 31 mars 2025. Ils ont affirmé qu'ils retourneraient sans hésitation dans le vaisseau spatial Starliner, construit par Boeing, pour rejoindre une nouvelle fois la Station spatiale internationale (ISS).

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