Abstract:
Optical Astronomy is as old as human life itself since the human eye can also func-
tion as a telescope, a detector and an analyser. However, the importance, potential,
and power of optical telescopes in discovering and deciphering the secrets of celes-
tial objects was realised only about four centuries ago, when the Italian Astronomer
Galileo Galilei used an optical telescope with a small aperture and turned it towards
the sky and began analysing visual observations of planets such as Venus, Jupiter,
Saturn, etc.