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

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

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

Italian astronomer Galileo Galilei peered through his newly improved 20-power homemade telescope at the planet Jupiter. He ...

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 ...

113 x 128.3 cm. (44.5 x 50.5 in.) Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...

23.1 x 37 cm. (9.1 x 14.6 in.) Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...

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 ...

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.

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 ...