APOD from 2011-08-16

Shapley 1: An Annular Planetary #Nebula

When a star like our Sun exhausts its fuel, it forms a white dwarf and expels its outer layers as a planetary nebula. Shapley 1, shown above, features a distinct ring structure, unrelated to actual planets but named for their telescopic resemblance.

HD image at https://apod.nasa.gov/apod/ap110816.html