Linked from

The 7 pages that link to Horsehead Nebula, each with the reason it gives.

• AstrophotographyBroader topic: Its striking shape became recognizable through long-exposure images.

• Orion NebulaCompared with: Unlike bright M42, it is seen chiefly as a silhouette against emission.

• Harvard College ObservatoryBroader topic: Fleming discovered it on a photographic plate at the observatory in 1888.

• Williamina FlemingBroader topic: Fleming identified it on a photographic plate in 1888.

• Dark nebulaBroader topic: Its silhouette shows a dense cloud outlined by bright background emission.

• Bok globuleRelated: Its prominent dark structure helped make small obscuring clouds recognizable in nebular imagery.

• Interstellar cloudBroader topic: Its familiar outline reveals how a dense cloud can block background light.