These objects are a fragment of the larger Orion Molecular Cloud Complex, a huge star-forming region that encompasses most of constellation Orion. The brightest among them is Orion Nebula (Messier ...

So-named for its resemblance to a horse's noggin, the Horsehead Nebula is a distinct cloud some 1,300 light-years away, forming part of the Orion molecular cloud complex. It's thick with dust and ...