Search results
Results from the WOW.Com Content Network
A minority hypothesis to explain the first burst has been proposed by Philip Ball, [103] Adrian Lewis Melott, and Brian C. Thomas, [104] [105] suggesting that the initial extinctions could have been caused by a gamma-ray burst originating from a hypernova in a nearby arm of the Milky Way galaxy, within 6,000 light-years of Earth.
Most observed events (70%) have a duration of greater than two seconds and are classified as long gamma-ray bursts. Because these events constitute the majority of the population and because they tend to have the brightest afterglows, they have been observed in much greater detail than their short counterparts.
GRB 190114C was an extreme gamma-ray burst explosion from a galaxy 4.5 billion light years away (z=0.4245; [2] magnitude=15.60est [3]) near the Fornax constellation, [4] [5] [6] that was initially detected in January 2019.
But astronomers look for short gamma-ray bursts, which only last about two seconds at the longest, as the telltale byproducts of the scarce events. What was unusual about this burst is that it ...
A nearby gamma-ray burst (less than 6000 light-years away) would be powerful enough to destroy the Earth's ozone layer, leaving organisms vulnerable to ultraviolet radiation from the Sun. [158] Gamma ray bursts are fairly rare, occurring only a few times in a given galaxy per million years. [159]
The brightest gamma ray burst ever detected recently reached Earth. It’s 70 times longer than any other burst we’ve spotted.
Dozens of telescopes all over the world are pointing at a patch of sky that gave rise to the most powerful gamma-ray burst ever seen, hoping to shed more light on processes that birth black holes.
GRB 130427A was a record-setting gamma-ray burst, discovered starting on April 27, 2013. [1] [2] [3] This GRB was associated to SN 2013cq, of which the appearance of optical signal was predicted on May 2, 2013 [4] and detected on May 13, 2013. [5] [6] The Fermi space observatory detected a gamma-ray with an energy of at least 94 billion ...