Galaxies are clouds of stars that range in both size and composition. Some contain hundreds of millions of stars while the largest galaxies can contain trillions of stars. And while it’s not entirely ...

“We see at most 3% of the universe,” said Pamela Gay of the Planetary Science Institute, citing a mind-boggling constraint that envelops each effort to respond to one of astronomy’s most venerable ...

The universe may be a little darker after a recent discovery has shown that there could be fewer galaxies populating it. A previous measurement by Hubble Space Telescope suggested there were 2 ...

Astronomers using NASA’s James Webb Space Telescope have stumbled upon a puzzling population of galaxies that look far too bright for their age. In four patches of sky, covering more than 500 square ...

What was the universe like in the first few hundreds of millions of years after it came into existence? How did the first stars and galaxies form? Those are questions that astronomers now have a ...