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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"
RCW 79: Stars in a Bubble
15/04/2005
April's Moon and the Pleiades
14/04/2005
A Window to the Once Secret Sky
13/04/2005
Inside the Elephant's Trunk
09/04/2005
Composite Crab
26/03/2005
Orion's Horsehead Nebula
21/03/2005
NGC 2266: Old Cluster in the New General Catalog
19/03/2005
The Fox Fur Nebula
14/03/2005
Infrared Ring Nebula
11/03/2005
NGC 1499: California Nebula
10/03/2005
Still Life with NGC 2170
03/03/2005
The Rosette Nebula
14/02/2005
A Telescope Laser Creates an Artificial Star
07/02/2005
NGC 3132: The Eight Burst Nebula
06/02/2005
NGC 2467: From Gas to Stars
31/01/2005
NGC 6946: The Fireworks Galaxy
25/01/2005
NGC 2440: Cocoon of a New White Dwarf
23/01/2005
NGC 346 in the Small Magellanic Cloud
18/01/2005
Nebula Nova Cygni Turns On
16/01/2005
Infrared Trifid
13/01/2005
Dust Sculptures in the Rosette Nebula
10/01/2005
UKIRT: Aloha Orion
06/01/2005
Milky Way Illustrated
04/01/2005
The Pleiades Star Cluster
03/01/2005
The Helix Nebula from Blanco and Hubble
29/12/2004
Tentacles of the Tarantula Nebula
28/12/2004
3C58: Pulsar Power
23/12/2004
Comet, Meteor, Nebula, Star
22/12/2004
Molecular Cloud Barnard 68
19/12/2004
In the Center of the Heart Nebula
08/12/2004