The giant planets weren't always where we find them today. Jupiter, Saturn, Uranus and Neptune formed in a more compact ...

"This work shows without a doubt that Parker Solar Probe is diving deep with every orbit into the region where the solar wind is born." ...

An ultra-hot rocky exoplanet may be wrapped in a dense atmosphere, defying expectations about what small planets can sustain.

Comet 3I/ATLAS will get closest to Earth on Dec. 19, and astronomers will be watching.

This rare interstellar visitor (C/2025 N1) is visible now! While too faint for the naked eye, amateur astronomers can easily ...