The constellation of Orion boasts too many wonderful nebulae to point them all out by name; some of the most well-known include the Eagle Nebula, the Pillars of Creation (which lurks within the Eagle Nebula), and, of course, the Orion Nebula itself. This mosaic features 3 of the best and brightest.
Taken by NASA's Wide-field Infrared Survey Explorer (more commonly known as WISE), all three nebulae are small subsets of the Orion Molecular Cloud Complex, which spans well over 100 light-years across. Specifically, we see NGC 2023 (or LBN 954), the Horsehead Nebula (also designated Barnard 33), and the Flame Nebula (or NGC 2024).
Ultimately, this view encompasses an area of sky equal to 3 full moons (1.5 degrees by 1.8). (See a larger image here.)