Galaxy rotation curve
Videos
The rotation curve of a disc galaxy is a plot of the orbital speeds of visible stars or gas in that galaxy versus their radial distance from that galaxy's centre. It is typically rendered graphically
Comparison of rotating disc galaxies in the present day (left) and the distant Universe (right).
Modified Newtonian dynamics
Videos
Modified Newtonian dynamics is a theory that proposes a modification of Newton's laws to account for observed properties of galaxies. Modifying Newton's law of gravity results in modified gravity, whi
Galaxy rotation curve
…Though dark matter is by far the most accepted explanation of the rotation problem, other theories have been proposed. One of the most notable is modified Newtonian dynamics (MOND), which involves alternative laws of gravitation. Vesto Slipher made the first measurements related to galaxy rotation curves in 1914 when observing…
MOND was proposed by Mordehai Milgrom in 1983
Distribution of astronomical systems in the phase space diagram or gravity, plotted by X. Hernández