File:Andromeda galaxy 2.jpg
This is a file from the Wikimedia Commons. Information from its description page there is shown below.
Commons is a freely licensed media file repository. You can help.
English: Hot stars burn brightly in this image from NASA's Galaxy Evolution Explorer, showing the ultraviolet side of a familiar face. At approximately 2.5 million light-years away, the Andromeda galaxy, or M31, is our Milky Way's largest galactic neighbour. The entire galaxy spans 260,000 light-years across -- a distance so large, it took 11 different image segments stitched together to produce this view of the galaxy next door.
The bands of blue-white making up the galaxy's striking rings are neighborhoods that harbour hot, young, massive stars. Dark blue-grey lanes of cooler dust show up starkly against these bright rings, tracing the regions where star formation is currently taking place in dense cloudy cocoons. Eventually, these dusty lanes will be blown away by strong stellar winds, as the forming stars ignite nuclear fusion in their cores. Meanwhile, the central orange-white ball reveals a congregation of cooler, old stars that formed long ago.
When observed in visible light, Andromeda’s rings look more like spiral arms. The ultraviolet view shows that these arms more closely resemble the ring-like structure previously observed in infrared wavelengths with NASA’s Spitzer Space Telescope. Astronomers using Spitzer interpreted these rings as evidence that the galaxy was involved in a direct collision with its neighbour, M32, more than 200 million years ago.Andromeda is so bright and close to us that it is one of only ten galaxies that can be spotted from Earth with the naked eye. This view is two-colour composite, where blue represents far-ultraviolet light, and orange is near-ultraviolet light.
|Date||15 May 2012|
|Public domainPublic domainfalse|
|This file is in the public domain because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)||
|Bits per component||
|Number of components||3|
|Horizontal resolution||72 dpi|
|Vertical resolution||72 dpi|
|Data arrangement||chunky format|
|Software used||Adobe Photoshop CS4 Windows|
|File change date and time||07:03, 15 May 2012|
|Image height||6,000 px|
|Image width||4,500 px|
|Date and time of digitizing||03:51, 3 April 2009|
|Date metadata was last modified||00:03, 15 May 2012|
|Source||Galaxy Evolution Explorer|
|Unique ID of original document||xmp.did:F87F1174072068118C149CD6F19E9A9B|
|Copyright status||Public domain|
1200 E. California Blvd.
Pasadena, CA, 91125 USA
Did you know...?
You can learn about nearly 6,000 different topics on Schools Wikipedia. By supporting vulnerable children right through to adulthood, SOS Childrens Villages makes a lasting difference to the lives of thousands of people. Education is a key part of our work, and our schools provide high-quality teaching to the children in our care. We have helped children in Africa for many years - you can help too...