Our moon is closer in size to Earth than any other moon in the solar system is to its associated planet, however it is far from the largest moon around.

How did the first solids that made up planets, moons and asteroids form from the "hot soup" that characterized our solar ...

Our Sun had a companion and there could be many undiscovered dwarf planets in the outer Solar System. That’s according to a new paper from scientists from Harvard University. Published today in The ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. An object has been discovered orbiting the sun far beyond ...

Researchers have been focusing on the study of our solar system for centuries, looking at the physics, dynamics, as well as the composition of solar system bodies. Our solar system – which includes ...

A distant 'exomoon' the size of Jupiter is changing how we think about the cosmos.

Mashable’s Ranked series crowns the best and sorts the rest. The planets of our solar system, stretching from Mercury out to Neptune, are all incredible. In a dense cloud of gas and dust billions of ...

Estimating ages of specific events is one of the most difficult problems in astrophysics. While we have a precise (and probably accurate) age for the solar system, we do not have precise ages for each ...

Have astronomers observed the first exomoon, or have they spotted a weird object that could challenge the very concept of ...

An artist's illustration imagines the newly discovered Farfarout (lower right), now confirmed to be the most distant object ever observed in our solar system. Farfarout is 132 times the distance of ...

Look up at the night sky and among the stars you might see a few brighter dots — the planets in our solar system. What you won’t see, though, are the most common kinds of planets in the Milky Way: ...