Abell 12

Abell 12 is a planetary nebula located in the constellation of Orion. It is known as the "hidden planetary" nebula because of the foreground star Mu Orionis making it difficult to observe.

Abell 12

Abell 12 is a planetary nebula located in the constellation of Orion. It is known as the "hidden planetary" nebula because of the foreground star Mu Orionis making it difficult to observe.