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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"
Vela Supernova Remnant Mosaic
10/01/2019
The Orion Nebula in Infrared from WISE
02/01/2019
The Witch Head Nebula
31/12/2018
The Great Carina Nebula
27/12/2018
NGC 6357: The Lobster Nebula
26/12/2018
Red Nebula, Green Comet, Blue Stars
20/12/2018
The Fairy of Eagle Nebula
02/12/2018
Across Corona Australis
29/11/2018
IC 1871: Inside the Soul Nebula
28/11/2018
Portrait of NGC 281
22/11/2018
The Tarantula Nebula
17/11/2018
The Cave Nebula in Hydrogen, Oxygen, and Sulfur
14/11/2018
The Lagoon Nebula is Stars, Gas, and Dust
12/11/2018
NGC 6188: The Dragons of Ara
07/11/2018
NGC 1499: The California Nebula
06/11/2018
IC 4592: The Blue Horsehead Reflection Nebula
05/11/2018
R Leporis: A Vampire's Star
31/10/2018
IC 59 and IC 63 in Cassiopeia
26/10/2018
Barnard 150: Seahorse in Cepheus
25/10/2018
Meteor, Comet, and Seagull (Nebula)
21/10/2018
Halo of the Cat's Eye
20/10/2018
M16: In and Around the Eagle Nebula
15/10/2018
Orion in Red and Blue
14/10/2018
The Falcon 9 Nebula
12/10/2018
NGC 1672: Barred Spiral Galaxy from Hubble
09/10/2018
Comet 21P Between Rosette and Cone Nebulas
08/10/2018
The Lonely Neutron Star in Supernova Remnant E0102-72.3
30/09/2018
55 Nights with Saturn
29/09/2018
The Light, the Dark, and the Dusty
28/09/2018
Irregular Galaxy NGC 55
21/09/2018