Behold My forms, O Arjuna (Partha), hundreds upon thousands of them, manifold, divine, varied in hue and shape. (5)Behold the Adityas, the Vasus, the Rudras, the two Ashvins and the Maruts. Behold, O Arjuna,many marvels never seen before. (6)
Purport
Pleased with the pure request from Arjuna Bhagwan Shri Krishna agreed to reveal his true form. The universal form which never seen before and includes all planets, all deities, and everything in this universe happening as now, has happened in the past and going to happen in the future.