Dynamical friction

In astrophysics, dynamical friction or Chandrasekhar friction, sometimes called gravitational drag, is loss of momentum and kinetic energy of moving bodies through gravitational interactions with surrounding matter in space. It was first discussed in detail by Subrahmanyan Chandrasekhar in 1943.

Part of a series on
Astrodynamics
Orbital elements
Types of two-body orbits by
eccentricity
Equations
Gravitational influences
N-body orbits
Preflight engineering
Efficiency measures
For the resistance of relative motion between solids, see Dynamic friction.
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