Galileo tried to take another round of pictures of Io in ... Galileo Galilei, first trained his telescope on Jupiter in 1610, he saw only four moons: Io, Europa, Ganymede, and Callisto (arranged ...

On this date, Jan. 7, 1610, astronomer Galileo Galilei ... Jupiter. Initially believing they were distant stars, Galileo’s repeated observations over several nights and realized they were moons ...

Galileo was the first to discover the moons of Jupiter. Michael Benson / Kinetikon Pictures / Corbis (Jupiter ... known to have been made by Galileo Galilei, the man who helped revolutionize ...

Discovered by Galileo in 1610, Io has since become one of the most fascinating objects in planetary science. Orbiting just ...

Jupiter’s four largest moons – Io, Europa, Ganymede and Callisto – were the first ever discovered orbiting another planet. They were spotted by Galileo Galilei more than 400 years ago ...

The images are bringing different ... in our solar system, such as Jupiter’s moon Europa and planets beyond our solar system.

The moon was first discovered by Galileo Galilei in 1610, but volcanic activity was not identified until 1979 when Nasa's Voyager 1 spacecraft captured images ... caused by Jupiter's gravitational ...