A recent paper is causing a stir among cosmologists and bloggers because it
appears to present evidence that dark matter may not exist. The authors’
observations reveal a strong correlation between the gravitational acceleration
observed to be acting on stars in galaxies and the gravitational acceleration
inferred from the distribution of luminous (baryonic) matter. If dark matter is
a particle, as almost everyone has been assuming, it can’t explain this
behavior. Ethan Siegel at Starts with a Bang comments on the situation here and Sabine Hossenfelder at
Backreaction discusses it here.
