At the eastern end of Orion's Belt is a gaseous region filled with
nebulae. Most famous of these by far is the
Horsehead Nebula, but the nearby
Flaming Tree is nearly as recognisable. Illuminated by the star
Alnitak, the eastern of the three stars of the
Belt, the Nebula is
patterned by dark dust-lanes that branch out from one another much like the boughs of a burning tree.