Monster black holes may be key to forming new galaxies.

The Orion Nebula gives birth to stars that scientists study to learn how planetary systems form.

The story of how scientists discovered dark matter and what they do and don't know about this mysterious substance.

Many galaxies cluster together like bubbles; scientist use the Hubble Telescope to see if the bubbles will continue to expand.

Astronomers hunt for clues that will reveal the first star that transformed the ancient universe and led to the creation of everything that followed.