Our planet has apparently had a small companion that went undetected for decades. What took so long to find it and why was it ...

Earth has a number of mini-moons and quasi-moons. Mini-moons are objects that orbit our planet. But they make for fickle fans: They tend to swing around Earth for only a matter of months. One example ...

TRAPPIST-1e, 40 light-years away, may have an Earth-like atmosphere, raising hopes for habitability beyond our solar system.

Astronomers might be close to confirming the presence of an Earth-like atmosphere on an exoplanet for the first time, ...

Satellite swarms orbiting the Earth are leaking more radiation into protected wavelength bands than ever. In fact, the second ...

Two nuclear-powered submarines, the Omsk and the Krasnoyarsk, fired Onyx and Granit cruise missiles at designated sea targets ...

Astronomers have identified an Earth-size exoplanet, TRAPPIST-1 e, 40 light years away that could potentially sustain liquid ...

It could mean two bright comets will be visible in the night sky at the same time, on the peak night of a meteor shower.

Three missions aimed at observing space weather are set to launch Sept. 23 from Florida. Here's what to know about NASA's ...

My favorite planet, besides the one I live on, is on the rise in the low eastern Butler sky during evening twilight. It’s ...

Kevin France, a professor of astrophysics at the University of Colorado Boulder, discusses the Habitable Worlds Observatory, ...

NASA has managed to get men on the moon, rovers on Mars, and probes around Saturn's rings. But it seems the space agency is yet to master how to make decent sushi in space.