Editing Dynamical friction (section)

{{Short description|Gravitational loss of momentum and energy by bodies moving through surrounding matter}}
{{More citations needed|date=July 2022}}
{{For|the resistance of relative motion between solids|Dynamic friction}}
In [[astrophysics]], '''dynamical friction''' or '''Chandrasekhar friction''', sometimes called '''gravitational drag''', is loss of [[momentum]] and [[kinetic energy]] of moving bodies through [[gravitation]]al interactions with surrounding [[matter]] in space. It was first discussed in detail by [[Subrahmanyan Chandrasekhar]] in 1943.<ref>{{Citation | first = S. | last = Chandrasekhar | authorlink = Subrahmanyan Chandrasekhar | date = 1943 | bibcode = 1943ApJ....97..255C | title = Dynamical Friction. I. General Considerations: the Coefficient of Dynamical Friction | journal = Astrophysical Journal | volume = 97 | pages = 255&ndash;262 | doi = 10.1086/144517 | url = http://repository.ias.ac.in/21144/1/326.pdf }}</ref><ref>{{Citation | first = S. | last = Chandrasekhar | authorlink = Subrahmanyan Chandrasekhar | date = 1943 | bibcode = 1943ApJ....97..263C | title = Dynamical Friction. II. The Rate of Escape of Stars from Clusters and the Evidence for the Operation of Dynamical Friction | journal = Astrophysical Journal | volume = 97 | pages = 263&ndash;273 | doi = 10.1086/144518 | doi-access = free }}</ref><ref>{{Citation | first = S. | last = Chandrasekhar | authorlink = Subrahmanyan Chandrasekhar | date = 1943 | bibcode = 1943ApJ....98...54C | title = Dynamical Friction. III. a More Exact Theory of the Rate of Escape of Stars from Clusters | journal = Astrophysical Journal | volume = 98 | pages = 54&ndash;60 | doi = 10.1086/144544 | url = http://repository.ias.ac.in/70616/1/70616.pdf }}</ref>
{{Astrodynamics}}