The size of the Solar System and the Universe is truly beyond our comprehension. When we think of the vastness of space, we often imagine distances that stretch far beyond the Earth, yet even our ...

A size comparison between Polymele and its unnamed satellite. (Image credit: NASA's Goddard Space Flight Center) The term " moon " can refer to any naturally occurring solid body that orbits a ...

Saturn has 83 known moons, the most of any planet in our Solar System. This size comparison video from MetaBallStudios lines them all up, with London as the background.

It was first discovered on July 1, sparking fears of an alien invasion. Now, scientists have provided a chilling update on the mysterious 'interstellar object' racing through our solar system.