Astrophysics (index)

Dynamical Friction

(Chandrasekhar Friction)
(drag produced by gravitational interaction with surrounding objects)

Dynamical Friction (or Chandrasekhar Friction) is drag on an object passing between other objects because of the gravitational attraction. Objects moving relative to each other are drawn toward each other's paths, with a net reduction in the relative velocity between them.

It is theorized to affect Galaxy collisions, due to its effect on the constituent stars, making a Galaxy Merger more likely.