GRB 100621A was a
gamma-ray burst observed on June 21, 2010, by the
Swift spacecraft. It is the second brightest gamma-ray burst yet observed, after
GRB 130427A
GRB 130427A was a record-setting gamma-ray burst, discovered starting on April 27, 2013. This GRB was associated to SN 2013cq, of which the appearance of optical signal was predicted on May 2, 2013 and detected on May 13, 2013. The '' Fermi'' space ...
.
[SpaceRef.co]
Record-Breaking X-ray Blast Briefly Blinds Space Observatory
European Southern Observatory - Wednesday, July 14, 2010 The distance is reported to be approximately five billion
light year
A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 ...
s, far outside our own
Milky Way Galaxy.
References
100621A
June 2010 events
Astronomical objects discovered in 2010
{{astronomy-stub