NGC 7721 is a spiral galaxy located around 79 million light-years away in the constellation Aquarius. NGC 7721 was discovered on September 10, 1785, by the astronomer William Herschel, and its diameter is 70,000 light-years across. NGC 7721 is not known to have much star formation, and it is not known to have an active galactic nucleus.

Supernova

One supernova has been observed in NGC 7721.

  • 2007le (TypeIa, mag. 15.2) was discovered by Berto Monard[it] on 13 October 2007.

External links

  • Media related to NGC 7721 at Wikimedia Commons