I recently finished watching season 2 of Ancient Apocalypse on Netflix. One of the episodes mentions that the very impressive Mayan long-count calendar reaches millions of years into the past and future. I hope a future episode will highlight or at least mention the ancient and vast Vedic timing cycles.
Vedic time cycles, which Vedic Astrology is built upon, are defined up to trillions of solar years:
Cycle of Brahma: 311,040,000,000,000 solar years (311 trillion)
Kalpa: 4,320,000,000 solar years (4.32 billion)
Manvantara: 306,720,000 solar years (306.72 million)
Mahayuga: 4,320,000 solar years (4.32 million)
Charna: 432,000 solar years (1/10 of a Mahayuga)
Satya Yuga: 1,782,000 solar years (4 charna)
Treta Yuga: 1,296,000 solar years (3 charna)
Dwapar Yuga: 864,000 solar years (2 charna)
Kali Yuga: 432,000 solar years (1 charna)
Compare this to some astronomical cycles and events:
Current age of universe: 13,700,000,000 solar years (13.7 billion)
Estimated age of universe at “heat death”: 100,000,000,000,000 (100 trillion)
Our sun’s orbit around Milky Way: 240,000,000 solar years (240 million)
Age of Earth: 4,543,000,000 solar years (4.543 million)
Age of Earth’s moon: 4,460,000,000 solar years (4.46 million)
Vedic time also names time units that go as small as Truṭi, which various sources define to be 300 nanoseconds, 29 microseconds, or 474 microseconds.