WASHINGTON — Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that formed beyond the orbits of its gaseous neighbors, possibly after ...

An exoplanetary system located about 116 light-years from Earth may be reshaping scientists’ understanding of how planets ...

Astronomers have uncovered a planetary system that challenges conventional theories of planet formation. The system likely includes a rocky planet that formed beyond the orbits of its gaseous ...

We know that our Solar System is not the blueprint for all planetary systems out there. There are gas giant planets orbiting closer to their stars than Mercury, and rocky worlds much larger than Earth ...

An organic molecule called methanimine was found scattered throughout a dense clump of gas and dust 554 light-years away.

The arrival of 3I/ATLAS in our solar system spawned multiple proposals for a rendezvous mission to study it up close. As the ...

Ancient fossils are revealing unexpected chemical survivors, challenging long-held assumptions about how biological carbon is preserved over Earth’s history.

When a comet leaves the Sun's warmth, astronomers typically anticipate its slow dimming into the darkness of space. However, the behavior of 3I/ATLAS has surprised the scientific community: ...

A moon can sit next door to another and still feel like a different world. Around Jupiter, that contrast shows up fast.

Tiny zircon crystals are revealing that Earth’s earliest history may have included surprisingly complex tectonic activity.

With Area 51 ruled out by President Obama, where might aliens really be hiding? Scientists have now revealed the best candidates.

For the first time, geologists from Tomsk Polytechnic University have studied how clay minerals in marine sediments change ...