Convert Sidereal Years to Planck Time
Convert Sidereal Years (a_sid) to Planck Time (t_P) instantly and accurately.
Conversion Formula
t_P = a_sid × 5.853590044e+50
About Sidereal Years
The sidereal year = Earth's orbital period relative to the stars = 365.25636 days = 31,558,149.8 s - about 20 min 24 s longer than the tropical year. The gap arises from precession of the equinoxes (~50 arcsec/year westward drift), which causes the tropical year to end slightly before the sidereal orbit completes. JPL DE440 ephemerides and J2000.0 epoch are anchored to the sidereal frame. 1 a_sid = 365.25636 d.
About Planck Time
The Planck time (t_P) = √(ℏG/c⁵) ≈ 5.391 × 10⁻⁴⁴ s — the time for light to travel one Planck length (~1.616 × 10⁻³⁵ m). Below this scale, general relativity and quantum mechanics both break down; a theory of quantum gravity is needed. No physical process or instrument approaches this timescale — it is a theoretical lower bound. Introduced by Max Planck in 1899. 1 t_P ≈ 5.391 × 10⁻⁴⁴ s.
Quick Reference Table
| Sidereal Years (a_sid) | Planck Time (t_P) |
|---|---|
| 1 a_sid | 5.854 × 1050 t_P |
| 2 a_sid | 1.171 × 1051 t_P |
| 5 a_sid | 2.927 × 1051 t_P |
| 10 a_sid | 5.854 × 1051 t_P |
| 25 a_sid | 1.463 × 1052 t_P |
| 50 a_sid | 2.927 × 1052 t_P |
| 100 a_sid | 5.854 × 1052 t_P |