Milky Way galaxy

The Milky Way is a galaxy located...somewhere in various worlds across the multiverse. Earth and other "Pony worlds" are commonly located within the galaxy's perimeter.

My Little Pony Comic
Masquerade flew around the Milky Way galaxy in a dream.

Equestria Girls
Though unconfirmed, it can be assumed that the galaxies depicted in the Canterlot planetarium are depictions of the Milky Way.

Hasbro universe
The Milky Way hosts countless life-supporting planets, stars and other celestial bodies.