Yout Favourite galaxy is SDSS J1038+4849 but how did it form like that? its like a face and its something ive nether

Question: Yout Favourite galaxy is SDSS J1038+4849 but how did it form like that? its like a face and its something ive nether seen before(Galaxys forming A face) so how did it form ? and how do u know? (or not )
- Keywords:
  face,
  galaxies
Asked by LJS to Maggie on 15 Nov 2017.
- Maggie Lieu answered on 15 Nov 2017:
  
  I know! That’s why I find it so amazing!
  
  It’s a galaxy cluster (lots of galaxies) but not all the galaxies are in the cluster. The mouth and the outline of the face (the arcs) are actually really far away galaxies. The light of these far away galaxies come close to the close to the galaxy cluster which contains alot of dark matter and gravity. The gravity of the cluster is so strong that it bends the light of the far away galaxies into arc shapes. This is called gravitational lensing and its how we find dark matter in the Universe.
  
  Another one that I really like is the space invader cluster Abell 68 which is made from the same effect:

Question: Yout Favourite galaxy is SDSS J1038+4849 but how did it form like that? its like a face and its something ive nether seen before(Galaxys forming A face) so how did it form ? and how do u know? (or not )