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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 Tropical Years (TY) is equal to 31556925.445 seconds, while 1 Galactic Years (gal) = 7.25328E+15 seconds.| 1491000000000 Tropical Years | to common time units |
|---|---|
| 1491000000000 TY | = 4.7051375838495E+19 seconds (s) |
| 1491000000000 TY | = 7.8418959730825E+17 minutes (min) |
| 1491000000000 TY | = 1.3069826621804E+16 hours (hr) |
| 1491000000000 TY | = 5.4457610924184E+14 days (day) |
| 1491000000000 TY | = 77796587034549 weeks (wk) |
| 1491000000000 TY | = 1491989340388.6 years (yr) |
| 1491000000000 TY | = 17903872084663 months (mo) |
| 1491000000000 TY | = 149180012170.24 decades (dec) |
| 1491000000000 TY | = 14918001217.024 centuries (cent) |
| 1491000000000 TY | = 1491800121.7024 millenniums (mill) |