Maharṣi Bhṛgu was born from the sacrificial fire. He was a great sage, and his very dear wife was Pulomā. He could travel in space like Durvāsā, Nārada and others, and he used to visit all the planets of the universe. Before the Battle of Kurukṣetra, he tried to stop the battle. Sometimes he instructed Bhāradvāja Muni about astronomical evolution, and he is the author of the greatBhṛgu-saṁhitā, the great astrological calculation.
(Srimad Bhagavatam-----1:19:9-10-----purport).

One receives an inferior or superior body at the discretion of the Supreme Personality of Godhead, Paramātmā. As stated in the previous verse:
manasaiva pure devaḥ
pūrva-rūpaṁ vipaśyati
anumīmāṁsate 'pūrvaṁ
manasā bhagavān ajaḥ
(S.B.6:1:48)
Everything depends on bhagavān, or ajaḥ, the unborn. Why doesn't one please Bhagavān to receive a better body? The answer is ajñas tamasā: because of gross ignorance. One who is in complete darkness cannot know what his past life was or what his next life will be; he is simply interested in his present body. Even though he has a human body, a person in the mode of ignorance and interested only in his present body is like an animal, for an animal, being covered by ignorance, thinks that the ultimate goal of life and happiness is to eat as much as possible. A human being must be educated to understand his past life and how he can endeavor for a better life in the future. There is even a book, called Bhṛgu-saṁhitā, which reveals information about one's past, present and future lives according to astrological calculations. Somehow or other one must be enlightened about his past, present and future. One who is interested only in his present body and who tries to enjoy his senses to the fullest extent is understood to be engrossed in the mode of ignorance. His future is very, very dark. Indeed, the future is always dark for one who is grossly covered by ignorance. Especially in this age, human society is covered by the mode of ignorance, and therefore everyone thinks his present body to be everything, without consideration of the past or future.
(Srimad Bhagavatam-----6:1:49-----purport).

Through astrology one can know past, present and future. Modern Western astrologers have no knowledge of the past or future, nor can they perfectly say anything about the present. Herein we find, however, that after hearing Śrī Caitanya Mahāprabhu's order, the astrologer immediately began his calculations. This was not a facade: he actually knew how to ascertain one's past life through astrology. A still-existing treatise called the Bhṛgu-saṁhitā describes a system by which anyone can immediately get information about what he was in the past and what he is going to be in the future.
(Sri Caitanya Caritamrta-----1:17:104-----purport).