Synopsis This important book deals with the study of astronomical science and its contribution to the world of Astronomy and science. Its comprises five illuminating lectures : The Constellation of the Zodiac; The sun and the Solar Forces; The Planets and the Planetary Influence; The earth and its Relation to the Sun; Heliocentric Science An Addenda on Richmond’s Religion of the Universe had been appended. Swami Abhedananda’s Treatment into this subject is very scientific and rational.