The moon greets Jupiter two days ahead of its full moon phase on Feb. 1.

The volcanic hot spot is larger than Lake Superior, spewing eruptions six times the total energy of all of the world's power plants.

There’s no mistaking Jupiter in the sky these winter evenings, rising in the southeast as evening twilight ends. In fact, you should be able to easily see it long before twilight fades. Jupiter is ...

Using data gathered by NASA's Juno Jupiter orbiter, scientists estimate that Europa's ice shell is about 18 miles thick — ...

"What makes the event even more extraordinary is that it did not involve a single volcano, but multiple active sources." ...

January doesn’t skimp on cosmic sightseeing. The month begins with a vibrant supermoon, continues with the year’s best Jupiter view, and ends with multiple moon-planet conjunctions. Aurora activity ...

A range of gorgeous skywatching targets are visible to the naked eye in city skies.