Regulus, a distant star, Venus and our moon will be visible during a conjunction tonight, and how Californians can best see ...

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 ...

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

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

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 ...

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 ...

Did you see the bright star next to the moon? That was Venus, and part of a conjunction between the moon, Venus and the star ...

Earth has a number of mini-moons and quasi-moons. Mini-moons are objects that orbit our planet. But they make for fickle fans: They tend to swing around Earth for only a matter of months. One example ...

The Solar System is vast, made up of eight planets, countless moons, and millions of asteroids, all orbiting the Sun. But like any territory, it has a boundary. This boundary is invisible, yet it ...

Three celestial bodies are preparing to meet up for one night in September in a cosmic conjunction that should be widely ...