Two new stamps feature Webb images of our amazing universe. The U.S. Postal Service issued them on January 22, 2024, to celebrate Webb's incredible mission.
When astronomers say a distant world is 'habitable,' what do they mean? Do they mean humans could live there? Do they mean we've discovered alien life?
Astronomers have discovered the oldest-known black hole. It dates back more than 13 billion years, to when the universe was only 400 million years old.
A new study analyzed the motions of satellite galaxy pairs around a large galaxy group and showed the universe may be younger than the standard model predicts.