On this date, Jan. 7, 1610, astronomer Galileo Galilei, with a homemade telescope, noticed three points of light near Jupiter. Initially believing they were distant stars, Galileo’s repeated ...

More pocked with craters than any other object in our solar system, Jupiter's outermost and second-biggest Galilean moon, Callisto, appears geologically unremarkable. In the 1990s, however, NASA's ...

LOS ANGELES -- NASA's Galileo spacecraft was set to make its last flyby of one of Jupiter's moons early today, marking the likely end of the science-gathering part of its 13-year mission. Galileo was ...

Scientist celebrated today for changing our view of the universe. Aug. 25, 2009 — -- Who invented the telescope? Not Galileo. Who first pointed it at the heavens? Again, it wasn't Galileo. So ...

I have always been fascinated by the discoveries and theories of early astronomers, before technology. They used mathematics, physics and observations to gain an understanding of the cosmos. Without a ...