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Planetary Nebula
An expanding shell of ionized gas ejected from a red giant star in the late stages of stellar evolution. Despite the name, it has no connection to planets. The glowing gas is illuminated by the hot core of the dying star.
Source: science.nasa.gov
APODs including "Planetary Nebula"
The Falcon 9 Nebula
12/10/2018
Rings Around the Ring Nebula
15/07/2018
The Extraordinary Spiral in LL Pegasi
08/07/2018
The Cat's Eye Nebula from Hubble
10/06/2018
NGC 1360: The Robin's Egg Nebula
11/05/2018
The Red Rectangle Nebula from Hubble
09/05/2018
M57: The Ring Nebula
17/04/2018
Bright Planetary Nebula NGC 7027 from Hubble
09/01/2018
The Helix Nebula from CFHT
03/01/2018
NGC 6369: The Little Ghost Nebula
28/10/2017
IC 418: The Spirograph Nebula
11/06/2017
M27: Not a Comet
09/06/2017
The Red Spider Planetary Nebula
19/04/2017
The Comet, the Owl, and the Galaxy
24/03/2017
The Calabash Nebula from Hubble
15/02/2017
The Butterfly Nebula from Hubble
08/02/2017
The Cat's Eye Nebula from Hubble
30/01/2017
IC 4406: A Seemingly Square Nebula
08/01/2017
The Extraordinary Spiral in LL Pegasi
11/12/2016
M27: The Dumbbell Nebula
02/11/2016
The Helix Nebula in Infrared
20/09/2016
M2-9: Wings of a Butterfly Nebula
24/07/2016
The Cat's Eye Nebula
03/07/2016
Cat's Eye Wide and Deep
28/05/2016
The Comet, the Owl, and the Galaxy
21/04/2016
NGC 6188 and NGC 6164
30/03/2016
Big Dipper, Deep Sky
23/01/2016
Cygnus: Bubble and Crescent
04/12/2015
M27: Not a Comet
20/08/2015
The Medusa Nebula
12/06/2015