The Ring Nebula (also known as NGC 6720) is a planetary nebula in the northern constellation of Lyra. Such objects are formed when a shell of ionized gas is expelled into the surrounding interstellar medium by a red giant star, which was passing through the last stage in its evolution before becoming a white dwarf.

Images by Gordon Collins

M57-150816A Gordon Collins

M57-150816B Gordon Collins

Images by Martin Crow


Images by Simon Dawes

M57 29-08-2005 processed

M37 36m SD

Images by Debra Holton


Images by Keith Rickard


Images by David Sheehan

M57 David Sheehan 2013

Images by Julian Tworek


Images by Andrew Wilson