The outer solar system has always been a mystery. It is full of icy objects and comets. The Oort Cloud is a region far beyond Pluto. It is filled with icy relics from the solar system's formation. Comets can hurtle toward Earth from the cloud, but scientists have never glimpsed its true shape. A planetarium show in New York was preparing "Encounters in the Milky...

Astronomers have found something weird in our galaxy. A team of scientists from around the world noticed a strange object. It sends out X-rays and radio waves in a repeating cycle. This happens every 44 minutes during intense activity. The object is 15, 000 light-years away. A light-year is 5. 8 trillion miles. It is in a busy part of the Milky Way. This area is full...