Q-PACE

R-process

{wiki=Radio_object_with_continuous_optical_spectrum}


Radio object with continuous optical spectrum

Relativistic beaming

Richtmyer–Meshkov instability

Rossby wave instability

{wiki=Rotational_Brownian_motion_(astronomy)}


Rotational Brownian motion (astronomy)

Rp-process

Rubble pile

S-process

SAO 206462

Scalar–tensor–vector gravity

Schönberg–Chandrasekhar limit

Solar physics

Sommerfeld parameter

Source function

Sołtan argument

Stationary orbit

Stellar pulsation

Strömgren sphere

{wiki=Astrophysics}

Astrophysics is a branch of astronomy that focuses on understanding the physical properties and underlying phenomena of celestial objects and the universe as a whole. It combines principles from physics and astronomy to study a wide range of topics, including the formation, evolution, and behavior of stars, galaxies, black holes, nebulae, and the overall structure of space-time.


Astrophysics

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 Children: Astrophysics