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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 Galactic Years (gal) is equal to 7.25328E+15 seconds, while 1 Metonic Cycles (mc) = 599616000 seconds.| 421000 Galactic Years | to common time units |
|---|---|
| 421000 gal | = 3.05363088E+21 seconds (s) |
| 421000 gal | = 5.0893848E+19 minutes (min) |
| 421000 gal | = 8.482308E+17 hours (hr) |
| 421000 gal | = 3.534295E+16 days (day) |
| 421000 gal | = 5.0489928571429E+15 weeks (wk) |
| 421000 gal | = 96830000000000 years (yr) |
| 421000 gal | = 1.16196E+15 months (mo) |
| 421000 gal | = 9681771972098.9 decades (dec) |
| 421000 gal | = 968177197209.89 centuries (cent) |
| 421000 gal | = 96817719720.989 millenniums (mill) |