Scientists have a threshold for planetary destruction. An object roughly 96 kilometers wide, striking Earth, would wipe out every living thing on the surface. Jupiter has several moons that clear that ...

NEW YORK: Astronomers are still finding moons at Jupiter, 400 years after Galileo used his spyglass to spot the first ones. The latest discovery of a dozen small moons brings the total to 79, the most ...

Galileo was the first person to see Jupiter's moons. He eyeballed the four brightest through his small telescope on winter evenings in early 1610. When I was a boy Jupiter had 12 moons. More than 275 ...

Astronomers have found 12 more moons orbiting the planet Jupiter. These moons are all small — just 5 kilometers or less across — and one of... Galileo Would Be Stunned: Jupiter Now Has 79 Moons More ...

CAPE CANAVERAL, Fla. (AP) — The solar system has a new winner in the moon department. Twenty new moons have been found around Saturn, giving the ringed planet a total of 82, scientists said Monday.

Young Jupiter’s powerful magnetic field may have created a safe zone where several large moons could survive. Saturn lacked this protection, possibly explaining why Titan stands almost alone among its ...

At first glance, Jupiter’s moon Io hardly looks real. Its surface is covered in swirls of yellow, orange, red, white, and black, with patterns that could easily be mistaken for an abstract painting.