But eventually, Galileo concluded that the moons’ orbits around Jupiter must be inclined to our line of sight, and drew the moons as they actually appear in the sky. Galileo was always drawing ...

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 ...

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.

Ganymede is the seventh moon and third Galilean satellite outward from Jupiter, orbiting at about 665,000 miles (1,070 million kilometers). It takes Ganymede about seven Earth days to orbit Jupiter.