The size of the solar system is defined by the volume of space over which the sun’s influence exceeds those of other nearby stars in the Milky Way galaxy.

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 ...

YouTuber and animator, MetaBallStudios, has created an enlightening 3D animation comparing the sizes of a handful of moons in our solar system.

Astronomers have long hunted a mysterious planet in the outer reaches of our solar system. These scientists think that it might really be a primordial black hole, ...

Our solar system could be hiding an extra planet in its outermost reaches. It is possible that a giant planet lurks in the Oort cloud, which begins hundreds of billions of kilometres beyond Pluto ...