Solar storm may light up the night sky, letting millions of Americans see the northern lights on the Fourth of July. A chain of powerful coronal mass ejections from the Sun is slated to strike Earth during the Fourth of July weekend, setting the stage...

Astronomers have discovered a mysterious exoplanet that defies current planetary formation theories. How could such an unusual world possibly exist? Astronomers have identified a striking exoplanet, GJ 523b, that defies established models of planetary...