Aupmanyav
Be your own guru
"There is no express passage which states that Punarvasu was ever the first of the Nakshatras, nor have we in this case a synonym like Agrahayana, or Orion, wherein we might discover similar traditions. There are, however, some indications about the oldest position of Punarvasu preserved in the sacrificial literature. The presiding deity of Punarvasu is Aditi, and we are told in the Aitareya Brahmana i.7, and the Taittiriya Sanhita 1.5.1, that Aditi has been blessed with a boon that all sacrifices must commence and end with her. The story begins with the statement that the Sacrifice (the mysterial sacrificial personage) went away from the gods. The gods were then unable to perform any further ceremonies, and did not know where it (the sacrifice) had gone to; and it was Aditi that helped them, in this state, to find out the proper commencement of the sacrifice. This clearly means, if it can mean anything, that before this time sacrifices were performed at random, but it was at this time resolved and fixed to commence them from Aditi. Aditi was thus the oldest and the first commencement of the sacrifice or the year In the Vajasaneyi Sanhita 4.19, Aditi is said to be ‘ubhaya shlrsham’, double -headed/' and the commentators interpret it to mean that the two termini of the sacrifices, which began and ended with Aditi, are the two heads here alluded to."
B. G. Tilak in "Orion or the Antiquity of Vedas"
B. G. Tilak in "Orion or the Antiquity of Vedas"