Lors de son 32e et dernier vol, un booster de Falcon 9 (SpaceX) a mis en orbite un vaisseau qui doit aller à la rencontre de plusieurs satellites pour prolonger leur vie. Une mission rare, et techniquement plutôt complexe.

Launched in 2006, NASA's New Horizons probe flew by the planet Pluto in 2015. But this week it "awakened from its longest sleep ever," reports CNN. It's now 5.9 billion miles (9.5 billion kilometers) from Earth... NASA's New Horizons spacecraft went into a planned hibernation mode on August 7, 2025, and woke up on June 23 using commands stored on its main computer. The mission's flight controllers at the Johns Hopkins University's Applied Physics Laboratory in Laurel, Maryland, confirmed that New Horizons is in great shape and ready to transmit a stream of science data gathered during hibernation from its location in the region of icy objects known as the Kuiper Belt. Pluto is the largest of thousands of frozen, rocky bodies called trans-Neptunian objects, or TNOs, that exist in the Kuiper Belt at the edge of our solar system — remnants from its formation 4.5 billion years ago... The spacecraft is capturing data about the rotation rates, orientations and shapes... The measurements provide insights into how planets are born from dust and pebbles, said Pontus Brandt, New Horizons project scientist at the Johns Hopkins Applied Physics Laboratory. "There seems to be more paired, snowman-shaped bodies, like Arrokoth, out there than anyone expected," Brandt wrote in an email. "Are such binaries the most common planetesimal and is this how larger planets have been built in our own and other stellar systems? These are very deep questions that New Horizons can help answer." The spacecraft also measures the distribution of gas in the outer heliosphere, the expansive, protective bubble formed by a steady stream of particles that release from the sun called the solar wind. Meanwhile, an instrument called the Pluto Energetic Particle Spectrometer Science Investigation is measuring galactic cosmic rays, extremely fast particles created when stars explode. The particles pose one of the more severe threats for human activities in space, Brandt said, but the boundary of the heliosphere acts as a shield to protect our solar system from 70% of them. New Horizons' data could help scientists learn more about how this puzzling shielding works, he said. Another instrument, the Venetia Burney Student Dust Counter, has collected data that has thrown New Horizon's team a curveball, Brandt said. The team expected dust abundance to be high within the Kuiper Belt due to the significant presence of small objects. But New Horizons has traveled beyond the known boundary of the Kuiper Belt — and it's still in a dusty environment.

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A près de 10 milliards de kilomètres de la Terre, la sonde New Horizons continue d'explorer le système solaire, bien au-delà de Pluton. Elle vient de passer près d'un an en mode économie d'énergie et reprend désormais son activité.

Le prochain test du Starship de SpaceX pourrait avoir lieu dès le 14 juillet 2026, quelques jours à peine après le dernier test statique au sol. Une étape majeure pour l'entreprise, désormais entrée en Bourse et scrutée d'encore plus près.

Oubliez le mythe hollywoodien du premier contact : il n’y aura pas de « grand jour de la révélation » pour la vie extraterrestre. La science n'évolue pas avec des coups de théâtre, mais par de patientes découvertes. Et c’est tant mieux pour la rigueur de nos connaissances, explique l'astrochimiste Hervé Cottin dans The Conversation.

La dernière version du Starship de SpaceX a réalisé un test statique durant lequel les six moteurs de l'étage supérieur ont été allumés. Une étape décisive avant un vol qui devrait avoir lieu d'ici quelques semaines.

Le rapport au sujet du désastre autour de la capsule Starliner est enfin sorti. L'inspection générale de la Nasa revient sur une suite de mauvaises décisions, en grande partie dues à la confiance trop importante accordée au constructeur sur la base de ses réalisations passées.

An anonymous reader quotes a report from Space.com: NASA provided an Artemis update today (June 30), announcing new lunar landing contracts for its Moon Base initiative and a surprise new possible rover mission that could be headed to the moon's south pole. During the second monthly update that NASA has provided for its moon base plans, the agency named Astrobotic, Firefly Aerospace and Intuitive Machines as the providers of four robotic landers that will deliver scientific payloads to the surface of the moon, as NASA tests and expands the technologies needed for a permanent human outpost. "This is this drawing on the playbook that worked very well for NASA during the 1960s," NASA Administrator Jared Isaacman said during the livestreamed update, explaining the experiential approach to a crewed lunar return. "We didn't just jump right to Apollo 11." Isaacman also announced the potential repurposing of an engineering development model built to mirror the agency's Perseverance and Curiosity rovers on Mars. "There is another," Isaacman said, quoting Yoda's line from "Star Wars: The Empire Strikes Back." That test rover is called PROMISE, short for "Polar Rover for Observation, Mapping, and In-Situ Exploration" (though it was formerly known as Optimism). PROMISE was developed at NASA's Jet Propulsion Laboratory (JPL) in Southern California, where it has been used as a test platform for fixes or commands that engineers want to try on the ground before permanently sending them to Perseverance and Curiosity. Now, NASA wants to send PROMISE on a mission of its own. Though sending PROMISE to the moon would leave Perseverance and Curiosity -- both of which remain active on Mars -- without an Earth-based testbed, Isaacman thinks it would be worth it. "We've had years now of experience operating the two rovers on the surface of Mars, and we've got this hardware that the taxpayers have invested a lot in," he said. "So the question was posed: 'What if we send it to the moon?'" With a little refurbishment, PROMISE would help advance NASA's lunar plans, Isaacman added. Like Perseverance and Curiosity, the test rover is powered by a radioisotope thermoelectric generator (RTG), which converts heat from naturally decaying radioactive material into electricity. So it wouldn't require sunlight to operate -- a real benefit on the moon, where most locations experience long stretches of darkness. (NASA plans to build its Artemis base near the moon's south pole, which is thought to harbor an abundance of water ice and also has a relatively complex lighting environment.) The other robots currently in the works to launch on future missions to the moon, including the landers announced during today's update, are all solar powered. Through 2029, NASA hopes to launch up to 20 such missions as part of the CLPS (Commercial Lunar Payload Services) initiative to support the first phase of the agency's moon base plans, and the landers announced today will be some of the first in that lineup.

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En pleine Coupe du Monde de football, la Nasa a fait une annonce étonnante. Elle s'engage à envoyer un ballon de foot jusqu'à la Lune en cas de victoire des États-Unis lors de la compétition. Plus loin qu'aucun ballon n'est jamais allé.

Les astronautes de la Nasa Jessica Meir et Christopher Williams vont sortir de la Station spatiale internationale pour réparer le Canadarm, un bras robotique qui présente des dysfonctionnements. Une aventure de quelques heures que l'on pourra suivre en direct.

Les plans sur l'avenir de la Station spatiale internationale sont toujours incertains. L'ISS est censée partir à la retraite d'ici 2030 et finir dans l'océan Pacifique. Mais une telle opération pourrait avoir des conséquences sur l'écosystème marin. Alors, comment faire ?

Pour sauver le télescope spatial Swift d'une destruction certaine, une mission de remorquage privée s'apprête à décoller fin juin 2026. Mais au lieu de partir de la mythique base de Cap Canaveral, la fusée s'élancera au-dessus d'un atoll perdu au milieu du Pacifique. Et ce n'est bien sûr pas un hasard.

Une substance inconnue a été détectée à la surface de Pluton et de Titan. Mais après plusieurs analyses, elle reste impossible à identifier avec certitude, ce qui rend les scientifiques perplexes.

Pour sauver le télescope spatial Swift d'une destruction certaine, une mission de remorquage privée s'apprête à décoller fin juin 2026. Mais au lieu de partir de la mythique base de Cap Canaveral, la fusée s'élancera au-dessus d'un atoll perdu au milieu du Pacifique. Et ce n'est bien sûr pas un hasard.

NASA's Nancy Grace Roman Space Telescope has arrived at Kennedy Space Center ahead of a Falcon Heavy launch targeted for no earlier than August 30. The observatory will survey the sky about 1,000 times faster than Hubble with a field of view at least 100 times wider, helping scientists study dark matter, dark energy, and exoplanets. Spaceflight Now reports: NASA's next great observatory, the Nancy Grace Roman Space Telescope, arrived at the Kennedy Space Center aboard the agency's massive Pegasus barge late Sunday morning. The spacecraft was nestled inside its protective case, which NASA nicknamed the "Chariot" in keeping with the "Roman" theme. That said, telescope is named not for the ancient empire, but instead for NASA's first Chief of Astronomy, Nancy Grace Roman. "She was a key person in our exploration of space. She understood that in order to better understand the universe, you have to go in space," said Lucas Paganini, the program executive for Roman. "That's why she's called the 'Mother of Hubble' because she made Hubble possible." [...] Roman is designed to operate near a fixed point in space called Lagrange Point 2, about 1.5 million km away from the Earth on the side opposite the Sun. It's designed to operate there for a minimum of five years, but Paganini said with the propellant onboard, it will likely last for 10 years or more. The telescope is+ equipped with a 300 megapixel camera called the Wide Field Instrument, which features 18 detectors. It was developed by BAE Systems (formerly Ball Aerospace). "It's going to allow us to observe at least 100 times wider field of view than what we can do with Hubble. Same resolution, but a wider area, 1000 times faster," Paganini said. "So what takes Roman a year to observe, it would take Hubble thousands of years. So it's definitely much more efficient." The observatory also features a chronograph instrument, developed by the Jet Propulsion Laboratory, which will allow Roman to observe the faint light of exoplanets near their stars. Paganini said Roman will also help scientists better understand dark matter and dark energy, the combination of which he calls the "dark universe." "100 years ago, we discovered that the universe was expanding. 25 years ago, we discovered that it was expanding at an accelerated pace and that's what led to a Nobel Prize," Paganini said. "What we don't quite know yet is if that acceleration is changing in ways. We don't know if it's actually dark energy, what is producing it, or is it simply that we don't understand gravity at all. "So eventually, we'll see if the laws of physics that we use these days are the right ones for what we are observing. But at the end is, we're trying to understand a very human question, which is where do we come from and where are wea heading in this universe that is our neighborhood?"

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La Nasa travaille sur un prototype de véhicule conçu pour pouvoir circuler même sur les terrains les plus accidentés. Surnommé Ernest, il a pour l'instant été testé dans le désert du Colorado, avant un futur vol peut-être vers la Lune ou Mars.

L'actualité scientifique de la semaine a été rythmée par le vol de la fusée Ariane 6 dans sa version la plus puissante, avec l'annonce inattendue d'un « mode barbecue ». Le confinement en urgence des astronautes de l'ISS a aussi révélé une crise entre la Nasa et Rocosmos.

L'introduction en bourse historique de SpaceX met en lumière les liaisons dangereuses entre Elon Musk et le nouveau patron de la NASA, Jared Isaacman. Ce dernier s'en défend, mais le soupçon de conflit d'intérêts indirect agite Washington.

L'introduction en bourse historique de SpaceX met en lumière les liaisons dangereuses entre Elon Musk et le nouveau patron de la NASA, Jared Isaacman. Ce dernier s'en défend, mais le soupçon de conflit d'intérêts indirect agite Washington.

Arrivé sur Mars en 2021, le rover Perseverance de la Nasa a parcouru aujourd'hui un peu plus de 42 kilomètres sur la surface de la planète rouge. Suffisant pour un marathon, ce qui s'est rarement produit sur une autre planète que la Terre.