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Spiral Arms
Regions of stars and interstellar matter that extend from the center of spiral galaxies, forming a spiral pattern; in the Milky Way, these include the Orion Arm where our Solar System resides.
Source: esa.int
APODs including "Spiral Arms"
Andromeda Island Universe
09/01/2010
M51 Hubble Remix
26/12/2009
The Jets of NGC 1097
27/11/2009
Bright Nebulae of M33
17/10/2009
NGC 3621: Far Beyond the Local Group
19/09/2009
NGC 1097: Spiral Galaxy with a Central Eye
27/07/2009
One-Armed Spiral Galaxy NGC 4725
06/06/2009
Messier 106
29/05/2009
Whirlpool Galaxy Deep Field
26/05/2009
M101: The Pinwheel Galaxy
14/04/2009
NGC 2442: Galaxy in Volans
28/02/2009
NGC 1569: Starburst in a Dwarf Irregular Galaxy
29/12/2008
M83: The Thousand-Ruby Galaxy
27/09/2008
M33: Triangulum Galaxy
13/09/2008
Grand Spiral Galaxy NGC 1232
24/08/2008
Facing NGC 6946
15/08/2008
Extra Galaxies
17/07/2008
The Far 3kpc Arm
11/07/2008
Barred Spiral Galaxy NGC 1300
22/06/2008
M51 Hubble Remix
14/06/2008
Two-Armed Spiral Milky Way
06/06/2008
Arp 272
30/04/2008
Messier 63: The Sunflower Galaxy
17/04/2008
Spiral Galaxy NGC 2841
29/03/2008
Galaxy Wars: M81 versus M82
25/03/2008
Andromeda Island Universe
24/01/2008
Hidden Galaxy IC 342 from Kitt Peak
09/01/2008
M51: Cosmic Whirlpool
05/01/2008
M74: The Perfect Spiral
01/12/2007
Spiral Galaxy M83: The Southern Pinwheel
24/07/2007