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Su, Jun; Wang, Weiguo; Wang, Sihui – Physics Education, 2019
In a spiral galaxy, the stars move in a circular motion around the galactic center, and the relation between velocity and the orbital radius is referred to as the rotation curve. Previous astronomical observation data indicate that the rotation curve is flat at the periphery of the galaxy, which completely dissatisfies Keplerian decline. Assuming…
Descriptors: Visualization, Scientific Concepts, Astronomy, Motion