This line engraving of Galileo depicts the astronomer alongside a drawing that shows Earth’s orbit around the Sun, as well as the Moon’s orbit around Earth. Line engraving by Boutrois ...

Galileo Moon Drawings. If the end of Galileo's life bore the poignant stamp of art, so did its beginning. To this day, on the facade of a Florentine palace, a plaque commissioned by Galileo's disciple ...

Uncover the mystery behind Saturn’s iconic rings. ExtremeTech explains their origins and the science of our solar system.

On this date, Jan. 7, 1610, astronomer Galileo Galilei, with a homemade telescope, noticed three points of light near Jupiter ...

The bottom half, supposedly written months later, contains a series of "doodles" that depict Jupiter's moons—once thought to be original notes from Galileo's observations in January 1610.

On Jan. 7, 1610, Galileo discovered four moons revolving around Jupiter — a discovery that would change his life forever. These four moons are Jupiter’s largest satellites — lo, Europa ...

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 ...

The first astronomer to discover moons around Jupiter was Galileo, back in the year 1610, but astronomers are still finding more and more moons around this gas giant. Accessibility links.

On November 5, 2002, NASA's old Galileo spacecraft was almost out of fuel. But the Jupiter mission still had some science to do. ‘On This Day in Space’ Video Series on Space.com Galileo flew ...