The Crab Nebula was first identified in 1731 by John Bevis. The nebula was independently rediscovered in 1758 by Charles Messier At the center of the Crab Nebula are two faint stars, one of which is the star responsible for the existence of the nebula. It was identified as such in 1942, when Rudolf Minkowski found that its optical spectrum was extremely unusual. The region around the star was found to be a strong source of radio waves in 1949 and X-rays in 1963, and was identified as one of the brightest objects in the sky in gamma rays in 1967. Then, in 1968, the star was found to be emitting its radiation in rapid pulses, becoming one of the first pulsars to be discovered.
Location: The Astrogazer Observatory
Camera: FLI ML8300
Mount: Orion Atlas Pro
Acquired with Sequence Generator Pro and PHD2
Processed in Pixinsight and Photoshop
4 hrs each HA 600 sec bin 1, Sii and Oiii
1 hrs each HA 900 sec bin 1, Sii, Oiii