Gamma-ray bursts

flashes of gamma rays from distant galaxies

group of satellites

W49B (also known as SNR G043.3-00.2 or 3C 398) is a nebula in Westerhout 49 (W49). The nebula is a supernova remnant, probably from a type Ib or Ic supernova that occurred around 1,000 years ago. It may have produced a gamma-ray burst and is thought to have left a black hole remnant.

pulling apart of a star by tidal forces when it gets too close to a supermassive black hole

Gamma-ray burst detected by the Neil Gehrels Swift Observatory on June 14, 2006

Gamma-ray burst

hypernova

supernova

galactic structure observable from a ring of 9 gamma-ray bursts

Wikimedia list article

thumb|right|200px|Gamma-ray bursts might have regulated the advent of intelligent life Neocatastrophism is the hypothesis that life-exterminating events such as gamma-ray bursts have acted as a galactic regulation mechanism in the Milky Way upon the emergence of complex life in its habitable zone. It is one of several proposed solutions to the Fermi paradox since it provides a mechanism which would have delayed the advent of intelligent beings in local galaxies near Earth.

celestial objects that can emit gamma-ray bursts

gamma-ray burst

Gamma-ray burst observed in 1999