Gamma ray is a part of electromagnetic wave band, just like X ray and visible light, but it carries very high energy. Gamma ray burst refers to the phenomenon that the intensity of gamma rays from a certain direction in the sky suddenly increases in a short time and then decreases rapidly. The duration is 0. 1- 1000 seconds. This is a phenomenon, not an event, so there is no such thing as an outbreak that year.

Generation: Gamma ray bursts are the most violent explosions in the universe. Theoretically, they are formed by the collapse and explosion of a giant star when the fuel is exhausted or the merger of two adjacent dense stars (black holes or neutron stars). Gamma ray bursts as short as one thousandth of a second and as long as several hours will release enormous energy in a short time. If compared with the sun, the energy it releases in a few minutes is equivalent to the sum of trillions of years of sunlight, and the energy of a single photon it emits is usually hundreds of thousands of times that of typical sunlight!

According to English, we can also see that the sounds ga and gamma are transliteration of the Greek letter γ.