Europa was one of four moons discovered on Jan. 7, 1610, by astronomer Galileo Galilei. Speaking of Galileo, this photo was ...

Astrophysicist P. Ajith discusses universe expansion, combining Einstein's theory of relativity and quantum physics for ...

Galileo Galilei was an Italian astronomer and scientist who, with his heliocentric theory in the 1600s, stated that the earth revolved around the sun. This was a revolutionary discovery ...