M 33 galaxy rotation curve with components decomposition. Dots with error bars represent observational data. Solid black line shows rotation curve composed of three components: dark matter halo (red dashed), stars (blue dash-dotted) and gas (green dotted).
<a href="//commons.wikimedia.org/wiki/User:Vallastro" title="User:Vallastro">Vallastro</a>
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<span class="int-own-work" lang="en">Own work</span>