Astronomers have uncovered new evidence that Jupiter’s moon Callisto likely harbors a massive underground ocean, potentially ...
Initially believing they were distant stars, Galileo’s repeated observations over several nights and realized they were moons orbiting the gas giant. And thus, Io, Europa and Ganymede became ...
Europa is the sixth largest satellite in our Solar System and the smallest of Jupiter’s four Galilean moons. Discovered by ...
SEE ALSO: NASA spacecraft saw something incredible near Jupiter's Great Red Spot From left, moons Ganymede ... in 1610 by Italian Renaissance man Galileo Galilei, has earned a reputation as ...