2.4 billion light-years away in Abell Cluster 520, a collision of galaxies has left a huge blob of dark matter in its wake.
The above picture contradicts a previous observation when blobs of dark matter collided but then remained with their respective galaxies.
Scientists aren’t really sure what dark matter is. Some think it is a weird collection of sub-atomic particles that interact weakly with the matter we can see.
Scientists think their may be different kinds of dark matter that are stickier than others explaining the blob left behind.
Only about 15 percent of all matter in the universe is visible to us.
Some think dark matter may be entire planets or universes!
What about you?