Research and development is underway to create robots that can hunt for signs of life in the vast oceans that exist under the ...

On January 7, 1610, the Italian astronomer Galileo discovered three of Jupiter's moons: Callisto, Europa and Io. When he ...

Europa was one of four moons discovered on Jan. 7, 1610, by astronomer Galileo Galilei. Speaking of Galileo, this photo was ...

Callisto may not make headlines like Io or Europa, but its beauty is unmatched. See this mysterious moon as you’ve never seen ...

Sixty-seven orbits of Jupiter. Two close-ups of its moon Europa—where astrobiologists think microbial life may exist—21 flybys of far-out Callisto, and nine months in orbit around the biggest ...

If conditions are clear, anyone with a pair of binoculars or a telescope may even be able to pick out details, such as Jupiter’s four largest moons — Ganymede, Callisto, Io and Europa.

Callisto lies slightly closer to Jupiter than Ganymede. Less than 20 minutes later, Europa’s shadow appears behind it, not trailing by much — because Jupiter is just past opposition ...

Dave Dexter, composer of The Galilean Suite, four tone poems about the largest moons of Jupiter—Io, ... [+] Ganymede, Callisto and Europa. It's fair to say that of all the moons, it’s Io—the ...

Jupiter's volcanic moon Io doesn't appear to ... but smaller gravitational tides from fellow moons Europa, Ganymede and Callisto, it means that a huge amount of tidal energy is injected into ...

This shows the view at 9 p.m. CST. Watching the dance of the four brightest of Jupiter's 95 known moons is a lot of fun, too. Io, Europa, Ganymede and Callisto change position night after night ...

If conditions are clear, anyone with a pair of binoculars or a telescope may even be able to pick out details, such as Jupiter’s four largest moons — Ganymede, Callisto, Io and Europa. The four ...