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

An object we thought belonged to the most common category of planet in the galaxy has turned out to be something we've never ...

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 ...

Watch this video to find out more about the Earth, planets in our Solar System and other planets far ... This allows us to compare the planets in even more detail. Mercury and Venus are both ...

Plate tectonics give Earth its mountains, earthquakes, continental drift and maybe even helped give rise to life itself. But ...

Emily Simpson, a passionate space enthusiast and recent Florida Tech graduate, has published groundbreaking research that imagines an alternate version of our solar system. Instead of the asteroid ...