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The galactic year, or cosmic year, is the duration of time required for the Sun to orbit once around the center of the Milky Way Galaxy. Estimates of the length of one orbit range from 225 to 250 million terrestrial years.
In relation to the base unit of [time] => (seconds), 1 Metonic Cycles (mc) is equal to 599616000 seconds, while 1 Galactic Years (gal) = 7.25328E+15 seconds.| 421000 Metonic Cycles | to common time units |
|---|---|
| 421000 mc | = 252438336000000 seconds (s) |
| 421000 mc | = 4207305600000 minutes (min) |
| 421000 mc | = 70121760000 hours (hr) |
| 421000 mc | = 2921740000 days (day) |
| 421000 mc | = 417391428.57143 weeks (wk) |
| 421000 mc | = 8004767.1232877 years (yr) |
| 421000 mc | = 96057205.479452 months (mo) |
| 421000 mc | = 800375.1934052 decades (dec) |
| 421000 mc | = 80037.51934052 centuries (cent) |
| 421000 mc | = 8003.751934052 millenniums (mill) |