This weekend, skywatchers are in for a stunning celestial display as Venus, Jupiter, and Mercury create a rare alignment in ...

The team still can't confidently rule out the existence of Europa's water vapor, especially as similar plumes have been more ...

Neptune has a complicated life story, and its moon Nereid might be the only one left standing from the planet’s ...

Ganymede and Europa transit Jupiter tonight, while Io disappears in an occultation. West Coast observers can catch a double ...

North America’s celestial highlights for the weekend ahead, which also apply to mid-northern latitudes in the northern ...