A passing star may have kicked the weird moons of giant planets like Jupiter and Saturn into place, new research suggests.

They believe that a star, slightly smaller than our Sun, passed very close to our solar system about billions of years ago.

Cornell University astronomers studying Jupiter's moon Io say tidal heating may help support life in the oceans of Jupiter's ...

Until scientists learn more then, here are seven of the most fascinating discoveries they’ve made about Saturn so far. The ...

By staring into the hellish landscape of Jupiter's moon Io—the most volcanically active location in the solar system—Cornell ...

Saturn has 146 identified moons in its orbit. They range in size, the smallest being a few hundred feet across, to Titan, the second ...

Jupiter’s largest moons, known as the Galilean moons, are known not only for their size but for their unique features. Discovered in 1610 by Galileo Galilei, these moons—Ganymede, Callisto ...

This week, meet a “scuba-diving” lizard, marvel at a spacecraft’s longevity, explore hidden physics in a painting, unravel ...

Check out these 5 images of planets such as Jupiter, Saturn, and others captured by NASA Hubble Space Telescope.

Update for Sept. 20: This story was updated after ESA released another image of Earth and the moon as seen by JUICE's JANUS scientific camera, which was designed to take high-resolution photos of ...

Saturn's moon, Titan, is the only other celestial body we know of where long-lasting reservoirs of liquid pool on the surface ...

The planet Saturn returns to our evening sky this week, and I think anyone who has ever seen it through a telescope would argue that it is their favorite ...