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« Il n’y aura probablement pas de Disclosure Day » : la quête de la vie extraterrestre n’est pas un film hollywoodien

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.

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NASA Wants To Send Spare Nuclear-Powered Mars Rover To the Moon

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.

Read more of this story at Slashdot.

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Sauvetage de Swift : pourquoi la mission de la dernière chance impose de partir d’un atoll perdu au milieu de nulle part

atoll marschall

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.

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Sauvetage de Swift : pourquoi le plan de la dernière chance s’élance-t-il depuis un atoll paumé dans le Pacifique ?

atoll marschall

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.

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NASA's Nancy Grace Roman Space Telescope Arrives In Florida

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?"

Read more of this story at Slashdot.

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Un télescope de la NASA est en train de tomber : une mission privée va tenter de le sauver avant qu’il ne soit trop tard

Swift Pegasus XL

Victime d’une activité solaire intense, le télescope spatial Swift de la NASA perd rapidement de l’altitude. Pour éviter qu’il ne se désintègre dans l’atmosphère, une mission de sauvetage privée inédite s’apprête à décoller fin juin pour tenter de le remorquer. Une première historique pour la maintenance en orbite.

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Course contre-la-montre en orbite : la NASA tente une mission historique pour sauver le télescope Swift

Swift Pegasus XL

Victime d’une activité solaire intense, le télescope spatial Swift de la NASA perd rapidement de l’altitude. Pour éviter qu’il ne se désintègre dans l’atmosphère, une mission de sauvetage privée inédite s’apprête à décoller fin juin pour tenter de le remorquer. Une première historique pour la maintenance en orbite.

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Jamais il n’avait volé aussi vite : le X-59 casse ses records de vitesse supersonique

x-59

Quelques jours seulement après avoir passé le mur du son, l’avion expérimental X-59 de la Nasa passe à la vitesse supérieure. En atteignant Mach 1,4 le 12 juin 2026, l’appareil vient de valider les conditions de vol réelles de sa future mission : prouver qu’un vol supersonique peut s’effectuer en toute discrétion.

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