A “fossil galaxy” has just been discovered inside of our Milky Way.
Despite only recently being found, scientists think it’s been there for around 10 billion years!
The new Milky Way is a spiral galaxy made up of many stars and is the galaxy where planet Earth is found.
Scientists think that the fossil, known as Heracles, could change our understanding of the history of the Milky Way, and how it was formed.
Astronomers named it Heracles, after the ancient Greek hero who received the gift of immortality when the Milky Way was created.
It’s very big! In fact researchers think that what’s left of the fossil galaxy makeup about a third of the spherical halo around the Milky Way.