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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"
Moon Over Andromeda
01/08/2013
Hidden Galaxy IC 342
18/07/2013
NGC 6384: Spiral Beyond the Stars
06/07/2013
One-Armed Spiral Galaxy NGC 4725
30/05/2013
Messier 77
10/05/2013
Grand Spiral Galaxy M81 and Arp's Loop
16/04/2013
Unraveling NGC 3169
28/03/2013
NGC 6822: Barnard's Galaxy
08/02/2013
The Arms of M106
06/02/2013
NGC 1309: Spiral Galaxy and Friends
16/01/2013
M33: Triangulum Galaxy
20/12/2012
NGC 1365: Majestic Spiral with Supernova
24/11/2012
Arp 188 and the Tadpole's Tail
08/11/2012
Galaxies, Stars, and Dust
13/10/2012
Spiral Galaxy NGC 5033
17/08/2012
21st Century M101
13/07/2012
IC 2574: Coddington's Nebula
22/06/2012
M65 and M66
15/06/2012
M51: The Whirlpool Galaxy
02/06/2012
GALEX: The Andromeda Galaxy
18/05/2012
M106 Close Up
03/05/2012
Barred Spiral Galaxy NGC 1300
25/03/2012
M95 with Supernova
22/03/2012
NGC 2683: Edge-On Spiral Galaxy
17/03/2012
NGC 5965 and NGC 5963 in Draco
16/02/2012
Facing NGC 6946
09/01/2012
Grand Spiral Galaxy NGC 1232
07/01/2012
In the Arms of M83
11/11/2011
Arp 272
22/09/2011
NGC 3521: Galaxy in a Bubble
15/09/2011