Saturn now leads the solar system with 274 known moons. Scientists say many moons formed from past collisions.

Jupiter’s four largest moons – Io, Europa ... Regular moons tend to orbit their planets in nice, circular orbits around the equator. Irregular moons typically orbit in big ovals further ...

Out past Neptune are countless small icy and rocky bodies called Trans-Neptunian Objects (TNOs), and many of these have moons ...

Astronomers have discovered a panoply of new moons orbiting Saturn, bringing the ringed gas giant's total up to 274 moons—far ...

What can a sample return mission from Jupiter's volcanic moon, Io, teach scientists about planetary and satellite (moon) ...

Their discovery ... I don't think Jupiter will ever catch up," Ashton said. All of the new moons are irregular moons. Irregular moons follow wide, elliptical orbits and are often highly inclined.

With the new spottings, Saturn has usurped Jupiter which has 95 known moons, while Uranus (28) and Neptune (16) remain third ...

Ellipses are defined as curves that surround two focal points. At any point on the ellipse, the sum of the distance to both ...

Saturn has surpassed Jupiter, which has 95 known moons, with the new sightings. Uranus (28), and Neptune (16) are still ...

This Jan. 2, 2010 image made available by NASA shows the planet Saturn, as seen from the Cassini spacecraft. THE CANADIAN PRESS/NASA/JPL-Caltech/Space Science Institute via AP VANCOUVER — Canadian and ...

With a whopping total of 274 moons, researchers say Saturn’s tug of war with Jupiter for the title is settled once and for all.