ekÄttara catur-yuge eka manv-antara
caudda manv-antara brahmÄra divasa bhitara
ekÄttara - seventy-one; catuḥ-yuge - in cycles of four ages; eka - one; manu-antara - period of a Manu; caudda - fourteen; manu-antara - periods of Manu; brahmÄra - of Lord BrahmÄ; divasa - a day; bhitara - within.
Seventy-one divya-yugas constitute one manv-antara. There are fourteen manv-antaras in one day of BrahmÄ.
A manv-antara is the period controlled by one Manu. The reign of fourteen Manus equals the length of one day (twelve hours) in the life of BrahmÄ, and the night of BrahmÄ is of the same duration. These calculations are given in the authentic astronomy book known as the SÅ«rya-siddhÄnta. An annotated Bengali translation of this book was compiled by the great professor of astronomy and mathematics Bimal PrasÄd Datta, later known as BhaktisiddhÄnta SarasvatÄ« GosvÄmÄ«, who was our merciful spiritual master. He was honored with the title SiddhÄnta SarasvatÄ« for translating the SÅ«rya-siddhÄnta, and the title GosvÄmÄ« MahÄrÄja was added when he accepted sannyÄsa, the renounced order of life.
