WHAT IS ASTRONOMY
Astronomy (from Greek: á¼€στρονομία) is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, and comets..
TYPES OF ASTRONOMY
THERE ARE TWO TYPES OF ASTRONOMY, ONE IS OBSERVATIONAL AND ANOTHER ONE IS THEORETICAL..
​
Observational Astronomy
The main source of information about celestial bodies and other objects is visible light, or more generally electromagnetic radiation.
Theoretical Astronomy
Theoretical astronomy is the use of the analytical models of physics and chemistry to describe astronomical objects and astronomical phenomena.
Ptolemy's Almagest, although a brilliant treatise on theoretical astronomy combined with a practical handbook for computation, nevertheless includes many compromises to reconcile discordant observations. Theoretical astronomy is usually assumed to have begun with Johannes Kepler (1571–1630), and Kepler's laws. It is co-equal with observation.
​