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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"
Messier 5
09/05/2019
The Great Nebula in Carina
07/05/2019
Virtual Flyby of the Whirlpool Galaxy
Video
06/05/2019
Clouds of the Large Magellanic Cloud
03/05/2019
The Cat's Eye Nebula in Optical and X-ray
01/05/2019
N11: Star Clouds of the LMC
29/04/2019
Southern Cross to Eta Carinae
26/04/2019
Pan-STARRS Across the Lagoon
25/04/2019
The Shape of the Southern Crab
24/04/2019
Milky Way in Northern Spring
19/04/2019
In the Vicinity of the Cone Nebula
16/04/2019
Rigil Kentaurus and Sandqvist 169
13/04/2019
A Cosmic Rose: The Rosette Nebula in Monoceros
12/04/2019
A Scorpius Sky Spectacular
07/04/2019
Messier 2
04/04/2019
Wisps Surrounding the Horsehead Nebula
03/04/2019
NGC 1333: Stellar Nursery in Perseus
27/03/2019
AE Aurigae and the Flaming Star Nebula
26/03/2019
Horsehead and Orion Nebulas
18/03/2019
NGC 3324 in Carina
16/03/2019
A View Toward M101
15/03/2019
Stardust and Starlight in M78
08/03/2019
Sharpless 249 and the Jellyfish Nebula
07/03/2019
The Orion Bullets
03/03/2019
NGC 6302: The Butterfly Nebula
02/03/2019
A Charioteer's Comet
01/03/2019
Magnetic Orion
27/02/2019
The Stars of the Triangulum Galaxy
23/02/2019
Reflections on vdB 9
21/02/2019
Doomed Star Eta Carinae
20/02/2019