NASA captured this stunning image of Messier 75 or M75, also known as NGC 6864, which is a giant globular cluster of stars in the southern constellation Sagittarius.
For humans, the most important star in the universe is our Sun. The second-most important star is nestled inside the Andromeda galaxy. Don't go looking for it -- the flickering star is 2.2 million ...
In commemoration of Edwin Hubble's discovery of a Cepheid variable class star, called V1, in the neighboring Andromeda galaxy 100 years ago, astronomers partnered with the American Association of ...