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 ...

When Nasa's Juno probe approached Jupiter it caught sight of its four big moons - Callisto, Ganymede, Europa and Io. When Galileo Galilei's discovered these moons in 1610, it marked the birth of ...

In January 1610, astronomer Galileo Galilei spotted what he thought were four small stars tagging along with Jupiter. These pinpricks of light are actually Jupiter's four largest 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 ...

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.

On a cold January day in 1642, Galileo Galilei took his ... centre of the universe. The Moon wasn't a perfect celestial orb, he said, but pockmarked with craters. Jupiter had its own moons ...

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 ...