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Nebula
A nebula is a giant cloud of gas (mostly hydrogen and helium) and cosmic dust situated between stars in the interstellar medium. Nebulae serve as sites of stellar birth and death—including emission nebulae that glow from ionized gas, reflection nebulae that scatter starlight, and dark nebulae that obscure background stars.
Source: science.nasa.gov
APODs including "Nebula"
From the Galactic Plane through Antares
02/07/2018
Messier 24: Sagittarius Star Cloud
29/06/2018
Sigma Octantis and Friends
28/06/2018
Dark Nebulas across Taurus
26/06/2018
Pillars of the Eagle Nebula in Infrared
20/06/2018
The Cat's Eye Nebula from Hubble
10/06/2018
Countryside Mars and Milky Way
09/06/2018
The Gum Nebula Expanse
24/05/2018
In the Heart of the Tarantula Nebula
20/05/2018
NGC 1360: The Robin's Egg Nebula
11/05/2018
The Red Rectangle Nebula from Hubble
09/05/2018
The View Toward M101
04/05/2018
The Blue Horsehead Nebula in Infrared
23/04/2018
NGC 7635: The Bubble Nebula
19/04/2018
M57: The Ring Nebula
17/04/2018
NGC 6960: The Witch's Broom Nebula
08/04/2018
NGC 3324 in Carina
06/04/2018
NGC 2023 in the Horsehead's Shadow
29/03/2018
Mars Between Nebulas
27/03/2018
Announcing Nova Carinae 2018
25/03/2018
Sharpless 249 and the Jellyfish Nebula
23/03/2018
Camera Orion
21/03/2018
The Crab from Space
17/03/2018
The Seagull and the Duck
16/03/2018
Catalog Entry Number 1
15/03/2018
The Complete Galactic Plane: Up and Down
13/03/2018
Horsehead: A Wider View
09/03/2018
Arcs, Jets, and Shocks near NGC 1999
07/03/2018
Alborz Mountain Star Trails
02/03/2018
AE Aurigae and the Flaming Star Nebula
25/02/2018