01/17/12br/Scope - Mead LX50 10"br/Guide Scope - Celestron 80mmbr/Camera - Orion Starshoot Pro 2.0br/Exposure - 7 x 300 sec. + 6 Darksbr/Processing - Histogram Adjustment, Layersbr/Subject - The strongCrab Nebula/strong (M1, NGC 1952, Taurus A) is a supernova remnant and pulsar wind nebula in the a href="http://www.newworldencyclopedia.org/entry/Constellation"; target="_blank"constellation/a of Taurus. Located at a distance of about 6,500 light-years (ly) (2 kiloparsec (kpc)) from a href="http://www.newworldencyclopedia.org/entry/Earth"; target="_blank"Earth/a, the a href="http://www.newworldencyclopedia.org/entry/Nebula"; target="_blank"nebula/a has a diameter of 11 ly (3.4 pc) and expands at a rate of about 1,500 kilometers per second. At the center of the nebula lies the Crab Pulsar, a rotating neutron star, which emits pulses of radiation from a href="http://www.newworldencyclopedia.org/entry/Gamma_ray"; target="_blank"gamma rays/a to radio waves with a spin rate of 30.2 times per second.br/This nebula was the first astronomical object identified with a historical supernova explosion. Observed in 1731 by John Bevis, it was found to correspond to a bright supernova recorded by a href="http://www.newworldencyclopedia.org/entry/Chinese_astronomy"; target="_blank"Chinese/a and Arab astronomers in 1054.