Surya Prajnapti mentions that the winter solstice (Makara Sankranthi) begins when the Sun and Moon were in conjunction with the first point of Abhijit Nakshatra: that particular point of the elliptic which was 177:55:10 degrees east of the star “Zeta Piscium” and that the five-year cycle of the Vedic Calendar was then taken to commence from that span of time.
Abhijit means “Victorious” or “the one who cannot be defeated”. In Bhagavad Geeta, Krishna said that He was Shiva among Rudras; He was Arjuna among Pandava and He was Abhijit among Nakshatra Classical Vedic texts mention Abhijit as one of the most auspicious time for doing any auspicious activity excepting travelling to southern direction. Its deity is Lord Brahma. Some Vedic texts also mention that 28 minutes before and 28 minutes after 12:00 clock (a.m. and p.m. both) is called as Abhijit Muhurtah too
Various researches were done about the existence of Abhijit Nakshatra. This Nakshatra is present in ancient Vedic literature but is not seen in those texts after the Vedic period. However, as per the present association of stars with these Nakshatras, several of them are as far as 25º away from the ecliptic whereas Moon travels only about 5º on either side of the ecliptic. A research was done by 2 Tata Institute of Fundamental Research, Mumbai claims that after studying the sky pattern of 3500 BC to 2005 AD they identified that Moon’s path was closest to the maximum number of Nakshatras around 3000 BC. Abhijit Nakshatra could have been a supernova which existed during that time.
Yajur Veda and Atharvana Veda both mention Abhijit as a Nakshatra after Uttara Ashadha and before Shravana.
Maharshi Vyas has recorded in Mahabharat, Vana Parva (Chap.230, Verses 8-11), a dialogue between Indra and Skanda wherein it is stated that:
“Contesting against Abhijit (Vega), the constellation Krittika (Pleiades) went to ‘Vana’ the Summer Solstice to heat the summer. Then the star Abhijit slipped down in the sky. At that time, Dhanishta was given the first place in the list of Nakshatras. Rohini was also the first some time back. Now you decide what to do.” said Indra.
This dialogue shows that when Indra went to Summer Solstice, Vega started falling down. Many scholars have ridiculed this idea of Star Falling; but now it is proved by modern astronomy that it was a true fact that 12,000 years B.C., Vega slide down to the horizon from the heights of the sky, to become a pole star.
Between 21,800 and 20,840 years B.C Krittikas were at the Summer Solstice. Maharshi Vyas has recorded in Mahabharat, Vana Parva (Chap.230, Verses 8-11), a dialogue between Indra and Skanda where-in it is stated that, Contesting against Abhijit (Vega), the constellation Krittika Pliedes) went to “Vana” the Summer Solstice to heat the summer. Then the star Abhijit slipped down in the sky. At that time Dhanishta was given the first place in the list of Nakshatras. Rohini was also the first some time back. Now you decide what to do,” said Indra.
This dialogue shows that when Indra went to Summer Solstice, Vega started falling down.