Theoretical astronomy is a branch of astronomy which uses analytical models of chemistry and physics to outlines the features of astronomical objects and phenomena. Topics which are usually studied by the discipline are the stellar dynamics and evolution, the galaxy formation, the origin of cosmic rays, and the large-scale structure of matter in the Universe.
The discipline's origins are linked to Johannes Kepler and his laws.
Over the years, astronomy has been integrated with both physics and chemistry.
Physics has helped astronomy to understand astronomical phenomena; instead, astronomy has supported the clarification of physical events. The integration between physics and astronomy is known as astrophysics. The discipline main aim is to try to understand the features of astronomical objects such as luminosity, temperature, density and chemical composition.
The overlap of astronomy and chemistry is known as astrochemistry. This discipline focuses on the abundance and reactions of chemical elements and molecules in space, as well as the formation and evolution of molecular gas clouds.
Theoretical astronomy adopts different tools including analytical models and computational numerical simulations.
Apart from chemistry and physics, astronomers use mathematics all the time, as it permits them to count entities, sources and objects in the sky. As well as this, numbers can be associated with the quantity and type of light that astronomical objects emit. Furthermore, mathematics is used to create and test theories for the physical law which governs the celestial objects.
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