Asi (When the sky was clear with moon and stars, it is said that Asi (sword) arose, emitting fire. As it arose, the earth shook and the oceans got disturbed. Displaying the sword in the sky, being intent on a battle, (Rudra) moved in various directions. For Asi, Krttika is the birth star; Agni (fire) is the god; Rohini (Aldebaran) is the clan and Rudra is the teacher.) http://www.jgpandya.com/article/a1.pdf