Supermassive black hole

Supermassive black holes or SMBH were some of the largest black holes in the universe. Supermassive black holes could have more gravity than a billion giant stars put together. They were so powerful that they could hold together an entire galaxy and bend the light of its stars. Almost all galaxies had supermassive black hole at their cores.

Formation
Supermassive black holes were primarily formed after the death of a protoquasar. When protoquasars ran out of fuel, the black holes within them swallowed up their insides, rapidly growing in the gravity and with the gas they swallowed. These small black holes grew and merged, forming enormous and eventually supermassive black holes. SMBHs could also form in nebulae containing smaller black holes from ancient star clusters. These black holes could merge to form larger and larger ones, eventually harnessing enough energy to pull in entire galaxies around them.

Effects
Supermassive black holes were the reason most mature galaxies such as the galaxy had a spiral shape, as this was the result of the gravity pulling on the stars around it. However, SMBHs also consumed and destroyed the stars within a galaxy causing catastrophe’s such as a quasar.

If a supermassive black hole was created on a short time span, it would often trigger the creation of a supermassive white hole within the universe or even within another. This formed a bonded supermassive hole. Like with regular black and white holes, supermassive black holes could clash with supermassive white holes, often resulting in bits of the galaxy being flung out for billions of light-years in all directions. Supermassive black and white holes could fuse, resulting in supermassive grey holes.