
In his book, The Holy Science, Sri Yukteswar explained that the descending phase of Satya Yuga lasts 4800 years, the Treta Yuga 3600 years, Dwapara Yuga 2400 years, and the Kali Yuga 1200 years. The ascending phase of the Kali Yuga then begins, also lasting 1200 years. The ascending phase of the Kali Yuga began in September 499 AD. Since September 1699, we have been in the ascending phase of the Dwapara Yuga, according to Sri Yukteswar.
Quoting from The Holy Science, Sri Yukteswar states that our sun revolves round a grand center called Vishnunabhi, which is the seat of the creative power, Brahma, the universal magnetism. Brahma regulates dharma, the mental virtue of the internal world. Sri Yukteswar states: ...
the sun, with its planets and their moons, takes some star for its dual and revolves round it in about 24,000 years of our earth....
Essentially, When the sun in its revolution round its dual comes to the place nearest to this grand center, the seat of Brahma...the mental virtue, becomes so much developed that man can easily comprehend all, even the mysteries of Spirit."
Further, ...when the sun goes to the place in its orbit which is farthest from Brahma, the grand center...the mental virtue, comes to such a reduced state that man cannot grasp anything beyond the gross material creation. Paramahansa Yogananda, devotee of Sri Yukteswar, dates his forward in the book as 249 Dwapara (1949 AD). The period of 2400 years during which the sun passes through the 2/20th portion of its orbit is called Dwapara Yuga. Dharma, the mental virtue, is then in the second stage of development and is but half complete; the human intellect can then comprehend the fine matters of electricities and their attributes which are the creating principles of the external world.