The duration of life in Satyaloka

At the time of the final devastation of the complete universe [the end of the duration of Brahma's life], a flame of fire emanates from the mouth of Ananta [from the bottom of the universe]. The yogi sees all the planets of the universe burning to ashes, and thus he leaves for Satyaloka by airplanes used by the great purified souls. The duration of life in Satyaloka is calculated to be 15,480,000,000,000 years. {SB 2.2.26. text}