Medusa nebula (Abell 21)

The Medusa nebula, also known as Abell 21, is a planetary nebula in the constellation Gemini. 

It was discovered by astronomer George O. Abell in 1955 on the photographic plates of the Palomar Observatory Sky Survey (POSS), and he listed it as number 21 in his catalogue of Planetary Nebulae... Read more

Comet C/2022 E3 ZTF

C/2022 E3 ZTF is a long period comet that was discovered by astronomers Bryce Bolin and Frank Masci on 2 March 2022 using the Zwicky Transient Facility (ZTF) survey..... Read more.