Io, Europa, Ganymede and Callisto – four satellites of Jupiter – are popularly referred to as the Galilean moons. This is because these moons were discovered by the famed Italian astronomer Galileo Galilei in January 1610. And that discovery brought about astronomical changes to our perception of the solar system. A.S.Ganesh explains this discovery and hands you some nuggets about each of these moons.

from The Hindu - Home http://bit.ly/2M5LNiF