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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 Gregorian Years (GY) is equal to 31556952 seconds, while 1 Galactic Years (gal) = 7.25328E+15 seconds.| 1900 Gregorian Years | to common time units |
|---|---|
| 1900 GY | = 59958208800 seconds (s) |
| 1900 GY | = 999303480 minutes (min) |
| 1900 GY | = 16655058 hours (hr) |
| 1900 GY | = 693960.75 days (day) |
| 1900 GY | = 99137.25 weeks (wk) |
| 1900 GY | = 1901.2623287671 years (yr) |
| 1900 GY | = 22815.147945205 months (mo) |
| 1900 GY | = 190.10212048193 decades (dec) |
| 1900 GY | = 19.010212048193 centuries (cent) |
| 1900 GY | = 1.9010212048193 millenniums (mill) |