The rosy red structures of a nearby galaxy glow brightly in a new image from the Hubble Space Telescope. The Andromeda Galaxy ...

An curved arrow pointing right. Scientists using NASA's Fermi Gamma-ray Space Telescope have detected a mysterious signal in the Andromeda Galaxy. They're not sure what it is, yet, but there's a ...

Using variable stars as distance markers and the giant telescope on Mount Wilson, Edwin Hubble (then a young and little-known astronomer) was able to show that the Andromeda Nebula was over a ...

On Dec. 15, 1612, the Andromeda galaxy was seen through a telescope for the first time by a German astronomer named Simon Marius. The Andromeda galaxy is the closest major galaxy to the Milky Way ...

The Hubble Space Telescope has captured nearly 7,400 exposures of the Andromeda Galaxy, creating a mosaic image that reveals over 100 million stars and thousands of star clusters within its disk.

But with this new, larger telescope, Hubble was able to resolve images of the nebulae that showed individual stars. Around 1924, Hubble was looking at the Andromeda nebula and found to his ...