Edwin Hubble did not discover a specific galaxy. He is famous for proving that the universe is expanding and for classifying galaxies. He also made significant observations of the Andromeda Galaxy, which is the closest major galaxy to our own Milky Way.

However, it's important to note that Andromeda Galaxy was discovered in 964 AD by the Persian astronomer Abd al-Rahman al-Sufi.

Hubble's primary contributions were:

* Proving the existence of other galaxies: Before Hubble, it was widely believed that the Milky Way was the only galaxy in the universe.

* Developing a classification system for galaxies: He categorized galaxies into different types based on their shape and structure, which is still used today.

* Measuring the redshift of galaxies: This discovery led to the understanding that galaxies are moving away from each other, and the further they are, the faster they are moving. This is the basis for the Big Bang theory.

So, while Hubble didn't "discover" a galaxy in the sense of finding it for the first time, his work revolutionized our understanding of the universe and its contents.