The set recreates the observatory's internal optics, posable solar arrays, and opening aperture door across a 15-inch ...

A Florida startup has launched what it says is the first commercial demonstration of a nuclear-powered satellite technology, testing a power source that could allow future spacecraft and autonomous ...

Astronomers searching the deep sky with the European Space Agency's (ESA) Euclid space telescope have turned up the oldest ...

ROME—Stealth submarines fitted with space-shooting lasers, supply-chain sabotage and custom-built attack satellites armed ...

Just over four light-years away, the Alpha Centauri system holds the closest worlds beyond our own that might support life.

Cropped image of NASA’s James Webb Space Telescope observation of comet 3I/ATLAS with its Near-Infrared Spectrograph ...

A start-up company has permission to try its plan to bounce solar rays onto the dark side of Earth, turning night to day for ...

Reflect Orbital wants to direct sunlight at night with a network of satellites.

A giant mirror to create “sunlight on demand” was just approved by the United States Federal Communications Commission (FCC), ...

Scientists have identified new clues that could help astronomers spot one of the most famous hypothetical alien ...

Reflect Orbital's FCC-approved mirror satellite could brighten nights like a full moon, but no agency has reviewed its ...

The FCC says the most controversial aspect of Reflect Orbital's Earendil-1 satellite, the giant mirror, falls out of its ...