... Black spots have been discovered on Mars that are so dark that nothing inside can be seen. ... The Horsehead Nebula . ... One of the most identifiable nebulae in the sky, the Horsehead Nebula in Orion, is part of a large, dark, molecular cloud. Also known as Barnard 33, the unusual shape was first discovered on a photographic plate in the late 1800s. The Moon s Saturn . ... Jupiter, Vesta, and the Milky Way . ... Recorded on Thursday, Jupiter is the brightest object near picture center. ...