Turn a telescope to the eastern sky in the hours following midnight on Nov. 5 to see two colossal shadows darken the cloud ...

This article lists the top 7 largest moons in our Solar System, detailing their size, the planet they orbit, and key ...

The predawn hours of Aug. 8 present a perfect opportunity to see Jupiter's four largest moons line up next to the "King of the Planets" as it voyages through the stars of the constellation Gemini.

In the eastern morning sky, Venus is being swallowed by the rising sun’s glare. Taking Venus’s place this month is Arcturus, ...

Stargazers in Ireland will have the opportunity to witness 'one of the most spectacular events' of the year this weekend.

The Moon passes 5° north of Jupiter at 9 A.M. EDT. Just six percent illuminated by this evening, you can try to spot the young crescent Moon hanging above the gas giant in the western sky after sunset ...

Europa is the fourth largest of Jupiter's 95 moons and about 90% the size of Earth’s Moon. Its surface, covered in water ice, reflects five and a half times more sunlight, making it much brighter.

The hellish surface of a moon of Jupiter known as Io is riddled with hundreds of lava-spewing volcanoes that make the world one of chaos and violence. The brutal conditions also make Io intriguing to ...