Tuesday, 26 January 2016

cosmology - Dark Matter vs Modified Gravity


Why do cosmologists and astrophysicists assume that the reason for the higher velocities of outer stars in galaxies is due to matter at all? The name dark matter seems misleading. Couldn't gravity just work different on larger scales? After years of searching for a dark matter 'particle', we still have nothing. I'm a little puzzled at the constant search for a weakly interacting particle.




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