[Vince Ferrer]

“Habitability would need a careful study, but my initial thought is that M85-HCC1 in particular would be hazardous because of blasts of high-energy radiation from explosions such as supernova,” he responded. “M85-HCC1 should be forming an unusual number of exotic binary star systems including white dwarfs, neutron stars, and black holes that are prone to energetic outbursts, and when these outbursts do occur, they would be much closer by on average.”

Gamma ray bursts are powerful enough to wipe out life on planets in different systems light years away. It has been theorized that a gamma ray burst caused a mass extinction here on Earth. In fact, one study estimates that life cannot exist anywhere except for the outer rims of the galaxies, because the density of the stars at the centers of galaxies increases the number of gamma ray bursts a planet will experience.

This galaxy is so dense it must be sterile.

[FredZarguna]

It's so crowded, nobody goes there anymore.