The search for exoplanets, which orbit distant stars, has opened up a whole galaxy of worlds beyond our own. Over 3,700 have been discovered to date,...
Astronomers have yet to confirm the existence of a ninth planet lurking beyond Pluto. But new analysis of the Kuiper Belt suggests a planetary mass is...
New research suggests Neptune’s transition from the inner to the outer solar system was relatively slow and steady. The clues to the nature of Neptune’s ancient...