Medusa Nebula - planetary nebula
Medusa Nebula , is a planetary nebula located in the constellation Gemini .
Medusa Nebula is magnitude 16 and is 10.25' in size. For reference, the full moon is 30' (arc minutes) or 0.5° in size.
- Medusa Nebula
- planetary nebula
- Other Designation:
- Abell 21
* One can see up to magnitude 7-8 objects with perfect eyes under ideal dark sky conditions.