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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"
Geminid Meteors over Chile
08/12/2019
Pleiades to Hyades
06/12/2019
M27: The Dumbbell Nebula
03/12/2019
NGC 6995: The Bat Nebula
25/11/2019
Simeis 147: Supernova Remnant
21/11/2019
Young Stars in the Rho Ophiuchi Cloud
17/11/2019
M16 and the Eagle Nebula
15/11/2019
NGC 3572 and the Southern Tadpoles
08/11/2019
Messier 45: The Daughters of Atlas and Pleione
07/11/2019
21st Century M101
06/11/2019
Near the Center of the Lagoon Nebula
04/11/2019
Inside the Flame Nebula
02/11/2019
The Ghostly Veil Nebula
31/10/2019
M42: Inside the Orion Nebula
30/10/2019
The Ghosts of Cassiopeia
25/10/2019
Dark Seahorse in Cepheus
24/10/2019
BHB2007: A Baby Binary Star in Formation
16/10/2019
The Galaxy Above
15/10/2019
The Horsehead Nebula
06/10/2019
Molecular Clouds in the Carina Nebula
02/10/2019
Orion Rising over Brazil
30/09/2019
MyCn 18: The Engraved Hourglass Planetary Nebula
29/09/2019
The Annotated Galactic Center
27/09/2019
The Pelican Nebula in Gas, Dust, and Stars
25/09/2019
The Tulip in the Swan
21/09/2019
Along the Western Veil
19/09/2019
The Iris Nebula in a Field of Dust
12/09/2019
IC 1805: The Heart Nebula
11/09/2019
M31: The Andromeda Galaxy
09/09/2019
In Wolf's Cave
07/09/2019