The Crab Nebula is the result of a
supernova explosion that was observed by Chinese astronomers in 1054.
It shined so brightly that it was visible during the daytime for over
The nebula itself was first observed by John Bavis
in 1731. Later (in 1758), Charles Messier observed this object as
he was searching for Halley's comet. He initially thought he had
found it but later realized that the object was not moving in the
sky. He then thought that it would be helpful to compile a catalog
of objects that could potentially be misidentified as comets, making
the hunt for them less confusing. The Crab Nebula, as it now commonly
known, became the first Messier object.