Medusa Nebula [SEP] constellation
Medusa Nebula
The Medusa Nebula is a large planetary nebula in the constellation of Gemini on the Canis Minor border. It is also known as Abell 21 and Sharpless 2-274. It was originally discovered in 1955 by UCLA astronomer George O. Abell, who classified it as an old planetary nebula. The braided serpentine filaments of glowing gas suggests the serpent hair of Medusa found in ancient Greek mythology.
Until the early 1970s, the Medusa was thought to be a supernova remnant. With the computation of expansion velocities and the
- The Hercules Cluster is a group of stars observed in "The Wheel in Space".
- Kasterborous is the constellation in which Gallifrey is located.
- The Lotus Nebula is mentioned by John Hart as being where he could be experiencing 17 simultaneous pleasures in the episode "Exit Wounds".
- The Medusa Cascade is an Interuniversal Rift, and also a space-time rift. The Master mentions that the Doctor sealed the rift here in "Last of the Time Lords". It is mentioned to have