Can this be the explanation for dark energy?
Gravity is a long-range force. However, we assume it to act over infinite distances. All other forces are short-range and do not act beyond a certain range.
Maybe there is a limit to the distance upto which the gravitational force acts. Gravity stops acting after the distant galaxies have moved beyond a certain distance from each other, after which the galaxies continue to move away from each other, unrestricted due to the absence of a gravitational pull.
This question is in the General Section. Responses must be helpful and on-topic.