A general term for the study of celestial bodies as a whole.

Deals with the physical nature of the heavenly bodies.

Study dealing with the chemical aspects of the celestial bodies.

Study dealing with the structural formation of celestial bodies.

Has no relation to celestial bodies studies. But, the planetary positions have a bearing on the practice of Astrology, making predictions of a person's future from the time of birth and construct a Horoscope. A practice mostly followed in India.

Study dealing with the origin of the celestial bodies.

Study dealing with the possibility of life beyond earth.

Study of the Moon.

Study of the Spectrum.