This simulation shows a rotating galaxy. Due to the presence of dark matter, the rotation speed does not decrease as you'd expect when you go further out. Instead, the rotation velocity remains constant. A contrasting video (also on this channel) shows the rotation if all the mass was at the centre. This simulation is one of many made during creation of the Australian National University's free online astrophysics courses: https://www.edx.org/xseries/astrophysics It was created using the VPython library (vpython.org)
Simulation of rotating galaxy with flat rotation curve - YouTube |
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| Science & Technology Creative Commons Attribution licence (reuse allowed) | Upload TimePublished on 14 Oct 2015 |
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