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n4http://commons.wikimedia.org/wiki/Special:FilePath/M33_rotation_curve_HI.
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Subject Item
dbpedia:Galaxy_rotation_curve
rdfs:comment
The rotation curve of a disc galaxy (also called a velocity curve) is a plot of the measured magnitude of the orbital velocities (i.e., the speeds) of visible stars or gas in that galaxy versus their radial distance from that galaxy's centre and typically rendered graphically as a plot.The measured rotation rates of those stars do not match the calculated rates, which calculation is based on well known laws of physics.
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