New simulations examine whether the seven planets in the TRAPPIST-1 system could host moons, showing that only small, close-orbiting moons could remain stable over long periods ...

The newly identified cluster of Kuiper Belt objects lies about 4 billion miles from the Sun, offering fresh clues about how ...

Astronomers are closing in on one of the most tantalizing possibilities in planetary science, evidence that a previously ...

Across the Milky Way and beyond, planetary systems appear to fall into a few recurring blueprints, and recent exoplanet ...

The first planet ever found orbiting another star was detected in 1995, and it belonged to a class now known as a “hot Jupiter.” These exoplanets are comparable in mass to Jupiter but circle their ...

The giant planets weren't always where we find them today. Jupiter, Saturn, Uranus and Neptune formed in a more compact configuration and later underwent a violent reshuffling that scattered them to ...

This year NASA unveiled new discoveries beyond our solar system, the count has surpassed 6,000, with several thousands more ...

Learn more about PSR J2322-2650b, a lemon-shaped exoplanet that may be in a toxic relationship with its host star.

With sapphire waterfalls, lava rain and orbits around dead stars, these distant worlds push the limits of what’s possible.

Seven planets are aligning in the night sky this week, creating a brief chance to see a "planetary parade." Worldwide, the best day to see the alignment is today, Feb. 28. Mercury, Venus, Mars, ...

A Carnegie-led team of astronomers detected the strongest evidence yet of an atmosphere around a rocky planet beyond our ...

Astronomers photographed a baby planet, WISPIT 2b, during its formation process within a dusty ring around its star system.