- This image shows a ring of DARK MATTER in galaxy cluster Cl 0024+17. MOST OF OUR UNIVERSE IS MADE OF THIS STUFF.
- No one can SEE dark matter, so how do astronomers detect it?
- By observing distorted shapes of galaxies that are in the background of observations.
- This is known as GRAVITATIONAL LENSING.
- Since dark matter is just like regular matter, just seemingly invisible, it still has a gravitational pull on objects around it.
- When astronomers observe strange shapes or distortions its caused by some object with some gravity that pulls on other objects.
- But when we can’t see an object that would cause such to happen, we conclude on it being dark matter.
- Astronomers suggest that the dark-matter ring was produced from a collision between two gigantic clusters.”
- *disclaimer* this is a map that was super imposed on top of the galaxy cluster
- Image credit: NASA/The Hubble Space Telescope