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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"
Stars and Dust in Corona Australis
20/09/2018
Cocoon Nebula Deep Field
19/09/2018
Comet, Clusters and Nebulae
13/09/2018
M1: The Crab Nebula from Hubble
09/09/2018
Along the Western Veil
06/09/2018
The NGC 6914 Complex
30/08/2018
Nearby Cepheid Variable RS Pup
29/08/2018
Messier 20 and 21
24/08/2018
Comet, Heart and Soul
23/08/2018
Glowing Elements in the Soul Nebula
21/08/2018
The Pencil Nebula in Red and Blue
13/08/2018
Moon, Mars, and Milky Way
11/08/2018
Trapezium: At the Heart of Orion
05/08/2018
Central Cygnus Skyscape
04/08/2018
The Iris Nebula in a Field of Dust
01/08/2018
Clouds of Earth and Sky
24/07/2018
Rings Around the Ring Nebula
15/07/2018
The Extraordinary Spiral in LL Pegasi
08/07/2018
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