The Horsehead Nebula, also known as Barnard 33, is made of dense, cold clumps of collapsing interstellar material that are very slowly dissipating. Lighter gas around the horse has already eroded ...
This image, made by the NASA/ESA Hubble Space Telescope in 2013, shows Barnard 33, the Horsehead Nebula, in the constellation of Orion (the Hunter), in infrared light. Infrared has longer ...