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 ...

Planets with suns like Wolf 359 are subject to huge blasts of radiation that raise questions about their long-term ...

A powerful new tool comes online this year that could help astronomers locate the mysterious planet hiding somewhere beyond ...

While Pluto was demoted to dwarf planet status in 2006 ... on extremely elongated orbits that stay far away from Neptune, and ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

Known as Wolf 1069 b, the planet orbits a red dwarf star called Wolf 1069 ... and cooler than our Sun yet account for about 70% of all stars known in the Milky Way. CARMENES uses the radial ...

Charon is the largest moon of the dwarf planet Pluto, but calling it a moon is really a misnomer; Pluto and Charon actually form a binary system. Whereas a moon usually orbits a planet ...

While Charon is currently listed as a satellite or moon by the International Astronomical Union (IAU), consideration is being given to it perhaps being classified as a dwarf planet in its own right, ...

The planet, called Barnard’s b, orbits Barnard’s star ... Barnard’s star is a red dwarf star, a low-mass, cool star that comprises about 70% of all the stars in the Milky Way.

But once more objects were found to share similar orbits with Ceres ... Then there are "minor planets," which include the ...