For decades, our solar system was thought to have nine planets, with Pluto considered the smallest and farthest. But in 2006, ...

A recent study found that Jupiter was once twice the size that it is now, making it big enough to swallow up 2,000 Earths.

Hunting for the building blocks of life? Located in the asteroid belt, Ceres is likely a good bet, study finds ...

Jupiter, roughly 562 million miles from Earth today, has nearly 100 moons. But Batygin and his collaborator Fred Adams' research focused on two of the smaller ones, Amalthea and Thebe. Both are inside ...

Jupiter wasn’t always the planet we know today—it was once twice as big, had a magnetic field 50 times stronger, and its ...

NASA’s IMAP mission will study the heliosphere to understand solar wind and space weather, launching in fall 2025 from ...

"Rings are mostly made of ice and small rocks," said William Saunders, a planetary scientist at NASA's Langley Research ...

Mar. 17, 2025 — A combination of cosmic processes shapes the formation of one of the most common types of planets outside of our solar system, according to a new ... Webb Telescope Captures Its ...

The mystery of how planets and icy objects formed in the farthest reaches of our solar system just took an exciting turn. A ...

Astronomers have detected the most promising signs yet of a possible biosignature outside the solar system, although they ...