Astronomers have discovered what is believed to be the largest structure in the universe, more than 1.4 billion light-years across and containing seventy galactic superclusters. Our solar system is a ...

Imagine shrinking Earth to the size of a small ball to reveal just how vast the Universe is. If it were 12 centimeters wide, Jupiter would stretch over a meter across beside it. But the Sun would be ...

If you've ever taken an introductory astronomy class, you've probably seen the Hertzsprung-Russell (HR) diagram. This graph maps out the life cycle of stars by plotting their temperature against their ...