... Where can a telescope take you? Four hundred years ago, a telescope took Galileo to the Moon to discover craters, to Saturn to discover rings, to Jupiter to discover moons, to Venus to discover phases, and to the Sun to discover spots. ... The other side of Saturn's ring plane is now directly illuminated by the Sun. ... Where do stars form when galaxies collide? ... M7 is one of the most prominent open clusters of stars on the sky. ... Asaph Hall discovered both the Red Planet's moons in 1877. ...