The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...
Charon is unusual because it is the largest moon in the solar system compared with its parent body. In fact, Charon and Pluto are so similar in size that they are considered a double dwarf planet ...
Astronomers think that a dwarf planet hiding in the middle of our solar system could be a source of frozen water. The dwarf ...
All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...
An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...