If you look up on a clear night, the brightest and largest object in the sky will probably be the moon. And unless you have a decent telescope, it is the only natural satellite you can see with your ...

A 4-billion-year-old volcano? New research finds that Io, the solar system’s most volcanically active moon, can brag just that. A recent study of Io’s sulfurous atmosphere suggests that Jupiter’s moon ...

The solar system holds extraordinary wonders, from Voyager 1’s historic journey into interstellar space after traveling ...

Pluto may have been demoted to non-planet status, but it still commands a court of five moons, as is fitting for the king of ...

Aside from 2025 PN7, there are 7 other quasi-moons, according to the Planetary Society, which they refer to as “a gravitational sleight of hand.” From our terrestrial point of view, they may appear to ...

A passing star may have kicked the weird moons of giant planets like Jupiter and Saturn into place, new research suggests. When you purchase through links on our site, we may earn an affiliate ...

But it’s not just looks. Rocky composition, general size, orbital behaviors—a lot of those qualities can be the same on both ...

Uranus's moons — what is unique about each moon and why do they orbit at a tilt?

NASA’s Kepler observatory should be able to detect planetary moons – yet to be discovered – formed by far-away planetary collisions outside our Solar System, research by Amy Barr of the Planetary ...