The Crab Nebula, M1 in Taurus.
This image is a stack of 5 eight minute exposures shot through a Hydrogen-alpha filter.
The exposures were acquired using an SXV-H9 CCD camera on a Vixen R200SS 8" f/4 Newtonian equipped with a Paracorr coma corrector.
The exposures were defect-corrected, calibrated and stacked using AIP4WIN.
This image has been cropped down from its original size of 1392x1040.