I'm assuming that the OP was referring to gravitomagnetism with general relativity that was making the rounds a while back: https://link.springer.com/article/1

I'm assuming that the OP was referring to gravitomagnetism with general relativity that was making the rounds a while back: https://link.springer.com/article/10.1140/epjc/s10052-021-08967-3 https://link.springer.com/article/10.1140/epjc/s10052-021-08... ...not to be confused with the hypothesis that regular magnetism is the source of the unexplained measurements of the galactic rotation curves: https://www.nature.com/articles/360652a0 https://www.nature.com/articles/360652a0