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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"
The Pleiades Star Cluster
18/10/1997
Cold Wind From The Boomerang Nebula
15/10/1997
Hale-Bopp and the North American Nebula
09/10/1997
The Brightest Star Yet Known
08/10/1997
In the Center of 30 Doradus
04/10/1997
Colliding Supernova Remnants
02/10/1997
A Wolf Rayet Star Bubble
28/09/1997
Antares and Rho Ophiuchi
22/09/1997
MyCn18: An Hourglass Nebula
14/09/1997
Infrared Helix
01/09/1997
Infrared Trifid
28/08/1997
The Snake Nebula in Ophiuchus
24/08/1997
Sher 25: A Pending Supernova?
12/08/1997
Nebulosity in Sagittarius
10/08/1997
The Cygnus Loop
03/08/1997
The Cat's Eye Nebula
02/08/1997
Eagle Castle
30/07/1997
In the Center of the Keyhole Nebula
21/07/1997
At the Edge of the Helix
20/07/1997
Blue Stars and Red Pillars
18/07/1997
Doomed Star Eta Carinae
12/07/1997
Antares
24/06/1997
The Pipe Dark Nebula
21/06/1997
HH1/HH2: Star Jets
19/06/1997
Young Suns
11/06/1997
Tarantula Credit:
04/06/1997
The Heart Of Orion
23/05/1997
Shells in the Egg Nebula
20/05/1997
M42: A Mosaic of Orion's Great Nebula
11/05/1997
NGC 3242: The 'Ghost of Jupiter' Planetary Nebula Credit:
31/03/1997