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The application of physical theory to celestial systems such as stars, planets, galaxies, supernovae, and black holes. Astrophysics proper is concerned with explaining phenomena more so than making observations, the latter falling under the purview of astronomy.

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Importance of speed of sound in astrophysical flows

As for its importance in astrophysics, many astrophysical phenomena are highly energetic, reaching speeds well beyond the speed of sound of the medium one is looking at. …
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Understanding the notion of lose or win of angular momentum in accretion disk

An object with an angular momentum $L$ with respect to the central object tends to follow a circular orbit with a Keplerian angular frequency $\Omega$ such that the gravitational attraction is balanc …
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