The Dream Chaser spaceplane, which has been under development for two decades, now seems like it might be further than ever from taking flight. On Thursday, NASA, confirming an earlier Ars Technica report, said the first flight of the winged spacecraft will no longer berth with the International Space Station. Rather, the space agency said, the Dream Chaser program would be "best served" by a...

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Forget Ivy League admissions—NASA’s astronaut program has set a sky-high bar for admission standards, and 2025 was no exception. On Monday, the space agency announced the 10 people chosen for its 2025 astronaut candidate class, selected from over 8,000 applicants across the U.S. That’s an acceptance rate of about 0.125%, making the odds far more daunting than Harvard’s 4% admission rate. For...

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Space programs Federal agencies See all topics Follow Surrounding our solar system is a natural and enigmatic cosmic shield called the heliosphere — and a new mission has launched to help astronomers better understand it. Created by the solar wind, a constant flow of charged particles that stream away from the sun, the heliosphere acts as an enormous bubble that protects the planets in our...

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