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...

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...

Astronomers have finally figured out how the most common types of planets in our galaxy are formed—by watching a set of baby planets grow up in real...

Astronomers have finally figured out how the most common types of planets in our galaxy are formed—by watching a set of baby planets grow up in real...

A newly detected gravitational wave, GW250114, is giving scientists their clearest look yet at a black hole collision—and a powerful way to test...

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

For more than half a century, scientists believed they had a solid grasp of Jupiter’s size and shape. As the largest planet in the solar system,...

For more than half a century, scientists believed they had a solid grasp of Jupiter’s size and shape. As the largest planet in the solar system,...

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...