Galileo Galilei made an important discovery ... and helped him gather evidence for one of the most fundamental theories about our Solar System (which we will come onto a bit later).

On April 23, NASA’s Advanced Composite Solar Sail System, or ACS3 ... “In 1608, he wrote a letter to his friend Galileo Galilei: ‘Provide ships or sails adapted to the heavenly breezes ...

Europa is the sixth largest satellite in our Solar System and the smallest of Jupiter’s four Galilean moons. Discovered by ...

Saturn surpasses Jupiter with 128 newly discovered moons, becoming the planet with the most moons in our solar system.

four of the 95 natural satellites around the Solar System’s largest planet. Discovered by Galileo Galilei in 1610, Io, Callisto, Europa and Ganymede are proving to be fascinating topics of study ...