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 ...

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

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 ...

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 ...

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 ...

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.

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 ...