File:Galaxy rotation under the influence of dark matter.ogv

No higher resolution available.

Galaxy_rotation_under_the_influence_of_dark_matter.ogv ‎(Ogg Theora video file, length 16 s, 720 × 360 pixels, 4.96 Mbps, file size: 9.22 MB)

This free media file is from Wikimedia Commons. Its description page is included below.

Summary

Description	English: Left: A galaxy with a rotation curve as predicted before the effects of dark matter were known. Right: A galaxy with a flat rotation curve that can be explained by the effects of dark matter. Deutsch: Links: Eine Galaxie mit einer Rotationskurve, wie sie durch die Keplerschen Gesetze vorrausgesagt wird, ohne die Annahme, dass Dunkle Materie existiert. Rechts: Eine Galaxie mit einer horizonralen Rotationskurve, wie sie empirisch beobachtet wurde und die mit der Dunklen Materie erklärt werden kann.
Date	28 March 2012
Source	Own work; Simulation source code is available at http://beltoforion.de/galaxy/galaxy_en.html; The diagrams used in this animation are based on the file http://en.wikipedia.org/wiki/File:GalacticRotation2.svg created by PhilHibbs
Author	Ingo Berg


	This is a featured picture on the German language Wikipedia (Exzellente Bilder) and is considered one of the finest images. See its nomination here. If you think this file should be featured on Wikimedia Commons as well, feel free to nominate it. If you have an image of similar quality that can be published under a suitable copyright license, be sure to upload it, tag it, and nominate it.

I, the copyright holder of this work, hereby publish it under the following license:

You are free:

Under the following conditions:

attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Thumbnail	Dimensions	User	Comment
current	14:26, 31 March 2012		16 s, 720 × 360 (9.22 MB)	Eclipse.sx	Diagrams moved to align with the centre of the galaxy. Rotation curves changed to more closely resemble theoretic models.
	21:28, 28 March 2012		9.8 s, 720 × 360 (4.7 MB)	Eclipse.sx

There are no pages that use this file.

The following other wikis use this file:

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.

If the file has been modified from its original state, some details may not fully reflect the modified file.

Software used	Xiph.Org libtheora 1.1 20090822 (Thusnelda)