The Earth is so beautiful,” he tweeted, “it is like looking into paradise.” Massimino knows these aren’t moon-landing poetry, and he’s fine with that. “Launch was awesome!” even got roasted on ...

California-based startup Reflect Orbital aims to build a swarm of 4,000 giant mirrors in low Earth orbit to "sell sunlight" ...

Developers say space-based solar will be cost-competitive with utility-scale PV. A new documentary showcases a Caltech team’s ...

NEW YORK (AP) — Two bright green comets are streaming through the skies and are visible to skygazers in the Northern Hemisphere. Both hail from the outer edges of our solar system — possibly what’s ...

For thirteen years, from 2004 to 2017, the Cassini-Huygens mission conducted a detailed survey of the Saturn system. It fundamentally altered our understanding of gas giants and their satellites and ...

SpaceX's second-generation Starship vehicle has just made a graceful exit. The company achieved every major objective it set for the super-heavy lift vehicle's 11th flight test, the second-gen ...

In the early 1400s, nearly a century before Columbus’s fateful voyage to the Americas, China seemed most poised to use maritime might to create a global empire. Beginning in 1405, Ming Dynasty admiral ...

New observations from the James Webb Space Telescope hint that the universe’s first stars might not have been ordinary fusion-powered suns, but enormous “supermassive dark stars” powered by dark ...

An unusual double-ring structure spotted in space with the help of citizen scientists has turned out to be a cosmic rarity. The celestial anomaly, captured by a radio telescope, is an odd radio circle ...

NASA’s Jet Propulsion Laboratory announced Monday that it will cut around 550 jobs — around 10% of its staff. In a statement posted online, the lab’s director, Dave Gallagher, said the layoffs are ...