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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"
NGC 2266: Old Cluster in the New General Catalog
01/06/2002
The Pipe Dark Nebula
26/05/2002
East of the Lagoon Nebula
20/05/2002
Andromeda Island Universe
18/05/2002
N44C: A Nebular Mystery
14/05/2002
At the Edge of the Helix Nebula
12/05/2002
Cone Nebula Close-Up
03/05/2002
In the Center of the Omega Nebula
01/05/2002
Doomed Star Eta Carinae
28/04/2002
The Trifid Nebula from AAO
24/04/2002
Orion Nebula: The 2MASS View
20/04/2002
The Snake Nebula from CFHT
09/04/2002
NGC 2392 from Hubble
07/04/2002
An Unusual Globule in IC 1396
25/03/2002
The Cat's Eye Nebula
24/03/2002
NGC 2244: A Star Cluster in the Rosette Nebula
17/03/2002
LL Orionis: When Cosmic Winds Collide
13/03/2002
M27: Not A Comet
02/03/2002
A Radio Vista of Cygnus
18/02/2002
The Local Bubble and the Galactic Neighborhood
17/02/2002
The Great Nebula in Orion
13/02/2002
Reflection Nebula M78
11/02/2002
The Southern Sky in Warm Hydrogen
29/01/2002
Local Group Galaxy NGC 6822
23/01/2002
Thackeray's Globules
08/01/2002
The Mysterious Cone Nebula
07/01/2002
M2-9: Wings of a Butterfly Nebula
06/01/2002
M16: Infrared Star Hunt
04/01/2002
M16: Stars, Pillars, and the Eagle's EGGs
03/01/2002
Trifid Pillars & Jets
30/12/2001