Could this explain the observed speeds of the stars and galaxies without dark matter playing a role?

这可以不需要借助于暗物质的作用来解释观测到的恒星和星系的速度吗？

youdao

To their surprise, when he and Mr Tieu did the calculation with general relativity, they found that they were able to reproduce the observed speeds at which individual stars are orbiting the centre of a galaxy, without requiring the galaxy to contain dark matter.

ECONOMIST: Cosmology