Astronomers have discovered a surprising planetary system that does not follow the usual rules of how planets form. The finding, led by researchers...

When it comes to planets, bigger is not always easier to understand. The largest planets in the universe are gas giants—massive worlds made mostly...

When it comes to planets, bigger is not always easier to understand. The largest planets in the universe are gas giants—massive worlds made mostly...

A small red dwarf star in the Milky Way has drawn attention after astronomers mapped four closely orbiting planets around it. The system, known as LHS...

A small red dwarf star in the Milky Way has drawn attention after astronomers mapped four closely orbiting planets around it. The system, known as LHS...

Astronomers have detected a smelly gas best known for the odor of rotten eggs—hydrogen sulfide—in the atmospheres of four giant planets far beyond...

It would be understandable if you stopped thinking as much about Pluto after it was “demoted” from being considered one of the nine...

It would be understandable if you stopped thinking as much about Pluto after it was “demoted” from being considered one of the nine...

A hidden swarm within our solar system.

Jupiter in true color. Credit: NASA/STSCI (S.T.A.R.S) / Wikimedia Commons / Public domain Jupiter, the largest planet in the solar system, is slightly...