The light echoes we see in the sky can take years or even centuries to reach us. What is a light echo? At any given moment in ...

A federal judge will hold a hearing to consider dissolving a policy that limits how long Customs and Border Protection can ...

Learn about the universe's earliest black hole, located within an unusually bright and red galaxy that was born 500 million years after the Big Bang.

Scientists have found the earliest black hole in the universe that existed just 500 million years after the Big Bang. The discovery was revealed in a new paper published in The Astrophysical Journal ...

The best time to watch a meteor shower is in the early predawn hours when the moon is low in the sky. Competing sources of ...