Using narrowband Ha and OIII filters, I recently took an image of the Medusa Nebula, a stunning emission nebula located in the constellation Gemini.

The Medusa Nebula is a planetary nebula in the constellation of Gemini. It is also known as Abell 21 and Sharpless 2-274. It was originally discovered in 1955 by University of California, Los Angeles astronomer George O. Abell, who classified it as an old planetary