This artist’s concept depicts one of the solar system’s inner planets slamming into Earth after being nudged on a collision course by a passing star. Such a world-shattering cataclysm is ...

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Revised observations showed it to be about 140 kilometers (87 miles) wide. But that’s still the biggest anyone has ever seen—most comets in the solar system are only one or two kilometers across.

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new simulations show.

CAPE CANAVERAL, Fla. (AP) — Astronomers are monitoring an object headed our way that may have wandered over from another star system.

Webb is embarking on a massive study of rocky worlds outside the solar system, specifically to learn whether exoplanets orbiting near cool red dwarf stars could have air.

Big changes are coming to Iowans’ taxes, health care, nutrition assistance, energy generation and student loans. Here's what ...

The space agency spotted the quick-moving object with the Atlas telescope in Chile earlier this week, and confirmed it was a comet from another star system.

Arguably, he's the biggest star in the UFC today, which means his hype in the trading card world is on fire.

This stunning image dubbed 'Cosmic Owl' captures a remarkable moment in deep space, billions of light years away.

NASA scientists have confirmed that a mysterious object shooting toward us through the solar system is an "interstellar object" — only the third of its kind ever seen. Experts have also given ...

Astronomers are monitoring an object headed our way that may have wandered over from another star system. The European Space Agency said Wednesday that scientists have discovered what might be ...