There’s no mistaking Jupiter in the sky these Shamokin winter evenings, rising in the southeast as evening twilight ends. In ...

While Io, the most volcanically active moon in the solar system, appears completely dry and devoid of water ice, its neighbor Europa is thought to harbor a vast global ocean of liquid water beneath ...

Jupiter's moon count reaches 95+ official satellites. Explore the history of the Jovian system, from Galileo to the latest NASA discoveries.

Turn a telescope to the eastern sky in the hours following midnight on Nov. 5 to see two colossal shadows darken the cloud tops of the gas giant Jupiter as the Galilean moons Io and Europa pass ...

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.

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 ...

The Italian scientist Galileo Galilei, when hearing about the invention of the telescope in 1608, decided to make his own ...

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

On this date, Jan. 7, 1610, astronomer Galileo Galilei, with a homemade telescope, noticed three points of light near Jupiter. Initially believing they were distant stars, Galileo’s repeated ...

Looking for a sky event this week? Check out our full Sky This Week column. January 29: Open cluster M50 The Moon passes 4° north of Jupiter at 9 P.M. EST. The pair shares the central regions of ...

February’s night skies hold a certain celestial splendor that only enthusiastic and vigorous skywatchers have the fortitude ...