But it hasn’t always been this way. Jupiter’s four largest moons – Io, Europa, Ganymede and Callisto – were the first ever discovered orbiting another planet. They were spotted by Galileo ...

The ringed gas giant Saturn has officially replaced Jupiter as the planet ... an astronomical object’s signal and make it more clear. Initially, they spotted 62 moons and a larger number of ...

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In other words, oceans can be found based on the magnetic fields they generate. Since moons like Jupiter's Callisto and Neptune's Triton have very strong ionospheres, readings with a ...

Jupiter’s moon Io, the most volcanically active body in the solar system, is littered with hundreds of erupting volcanoes. High-resolution images now reveal several dozen lava lakes, researchers ...

Fluorescent caves deep below America show how alien life could exist on one of Jupiter's moons, say scientists.

Fluorescent caves deep below America show how alien life could exist on one of Jupiter's moons, say scientists. The chemistry in Wind Cave, South Dakota, means that, under an ultraviolet (UV ...