File:Milky Way Arms.svg
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A "God's view" map of Milky Way as seen from far Galactic North (in Coma Berenices). The star-like lines center in a yellow dot representing the position of Sun. The spokes of that "star" are marked with constellation abbreviations, "Cas" for "Cassiopeia", etc. The spiral arms are colored differently in order to highlight what structure belongs to which arm. H II regions are marked as dots colored in the same colour as their spiral arm. They come in three sizes, measured by the excitation parameter U:
- small - U > 200 pc cm-2
- medium - 200 > U > 110 pc cm-2
- large - 110 > U > 70 pc cm-2
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|Description||A redevelopment of Image:Milky Way Arms-Hypothetical.png: details about method below.|
|Date||08:58, 9 June 2007 (UTC)|
|Source||User:YUL89YYZ, User:Ctachme, Kevin Krisciunas, Bill Yenne: "The Pictorial Atlas of the Universe", page 145 ( ISBN 1-85422-025-X) and µOR.|
The original image, Image:Milky Way Arms-Hypothetical.png, was dloaded and rotated by gimp, so that Sun is up, as is custom on Milky Way "God's view" maps. The image is then saved and imported into inkscape, and used as a template for vector editing by hand. Thereafter added:
- Momany, Zaggia, Gilmore, Piotto, Carraro, Bedin, Angeli, A&A press release, Released on March 16th, 2006, Last retrieved: 9 jun 2007
- Solstation.com: Outer Disk Ring?, review of a letter to New Scientist from Naomi McClure-Griffiths et al. (Both latest retrieved 9 Jun 2007)
- newscientist.com - Jenny Hogan: Milky Way spiral gets an extra arm, last retrieved 9 jun 2007
|Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
GFDLGNU Free Documentation Licensetrue
|This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.|
|This licensing tag was added to this file as part of the GFDL licensing update.CC-BY-SA-3.0Creative Commons Attribution-Share Alike 3.0
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