Here's why Jupiter's tally of moons keeps going up and up
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.
Saturn
PHOTOS: Great Conjunction Dazzles Stargazers Around The World
On Monday evening, Jupiter and Saturn appeared closer to each other in the sky than they have for hundreds of years in what has become known as the Great Conjunction.
You Don't Look A Day Over 100 Million, Rings Of Saturn
A new study shows that Saturn's rings are only 10 million to 100 million years old, much younger than the planet itself.
Cassini's Spectacular Legacy — And Nod To The Future
Following on Cassini's discoveries, NASA aims to probe Jupiter's Europa for potential life. With every new world we discover, we should look back at our own planet with awe, says Marcelo Gleiser.
Cassini's Saturn Mission Goes Out In A Blaze Of Glory
The NASA probe that has spent the past 13 years making countless discoveries about the ringed planet and its moons was taken out of orbit and sent plunging into Saturn's atmosphere.
Saturn's Strangest Sights, As Captured By A Doomed Spacecraft
NASA's Cassini spacecraft will crash into Saturn on Friday, but we'll always have the shots it took of icy volcanoes, hexagonal storms, ethane lakes and ripples in Saturn's rings.
Cassini Spacecraft Prepares For A Fiery Farewell In Saturn's Atmosphere
NASA's probe has spent the past 13 years orbiting Saturn, making a number of important discoveries along the way. On Friday, it will hurl itself into the planet's atmosphere and disintegrate.
Cassini Spacecraft Re-Establishes Contact After 'Dive' Between Saturn And Its Rings
The Cassini probe has orbited Saturn for 13 years. This is the first time it entered the gap between the planet and its rings.
Cassini Craft Beams Closest Images Ever Taken Of Saturn
The spacecraft is "showing us new wonders and demonstrating where our curiosity can take us if we dare," NASA's planetary science director says.
Cassini Spacecraft Starts Weaving Between Saturn And Its Rings
"Shields Up!" the Cassini craft's Twitter feed announced Wednesday. If all goes well, new images of the ringed planet will reach Earth early Thursday.