Barnard 33 in IC 434, otherwise known as the Horsehead Nebula, is a dark nebula—basically a cloud of dust that blocks the light behind it—in Orion. The bright star in the image is Alnitak, the left-hand star in Orion’s belt. It’s about 1,500 light years from Earth.
Shot 13 March 2010; Mt. Tamalpais State Park, California; ISO 800, Exp: 25 x 2.5 minutes (62.5 minutes total), f/5.2, Canon EOS 5D & Televue NP127is. Post-processing with ImagesPlus 3.0 and Photoshop CS4.
Copyright 1997-2017, by David Wilton