Abstract:
Today the science astronomy for the study of origins and evolutions has at an advancing level both theoretically and observationally. However, there are a number of works for further developments. For example, the data extracted on earth is highly extinct due to stellar winds, background radiations and planetary atmospheres. In this work we did on the effect of atmospheric extinction on astronomical photometry and spectroscopy analytically. The method we applied is the Planck’s radiation law where we did assume an exponential atmosphere that obeys the Beer-Bouguet-Lambert law of the optical depth equation. The results are in agreement with observational works and the standard theories. However, this work is limited to high approximations.