This illustration shows a newfound reservoir of stellar fuel discovered by the Herschel space observatory (red). Stars are formed out of pools of gaseous hydrogen molecules. To locate these pools, ...

Several telescopes have teamed up to discover a rare and massive merging of two galaxies that took place when the universe was just 3 billion years old (its current age is about 14 billion years). ...

This artist's concept illustrates the frenzied activity at the core of our Milky Way galaxy. The galactic center hosts a supermassive black hole in the region known as Sagittarius A*, or Sgr A*, with ...