In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small ...

Around 13.7 billion years ago, something collapsed. It fell outward into the nothingness that stretched in every direction, ...

Still, observation of Andromeda has come a long way. Roughly 100 years ago, our neighboring spiral galaxy was discovered by American astronomer Edwin Hubble. Previously, scientists thought the ...

Astronomers have released the most detailed image of the Andromeda galaxy with new clues about its evolutionary history to celebrate the 100th anniversary of Edwin Hubble's discovery that our ...

About 100 years after astronomer Edwin Hubble's discovered the "magnificent ... produced the most comprehensive survey of the Andromeda galaxy, or Messier 31. The Andromeda galaxy is approximately ...

Since Hubble’s launch, astronomers have discovered over 1 trillion galaxies, but Andromeda stands out as the closest and most ...

The Andromeda galaxy, then known as the Andromeda nebula ... much smaller than the space between them. Edwin Hubble was young and ambitious. At the of age 30, he arrived at Mount Wilson ...

The Andromeda ... is a galaxy a staggering 34 billion light years away, seen just 200 million years after the big bang, when the universe was 20 times smaller than it is now. Edwin Hubble would ...