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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 Hipparchic Cycles (HC) = 9593424000 seconds.| 20500 Galactic Years | to common time units |
|---|---|
| 20500 gal | = 1.4869224E+20 seconds (s) |
| 20500 gal | = 2.478204E+18 minutes (min) |
| 20500 gal | = 4.13034E+16 hours (hr) |
| 20500 gal | = 1.720975E+15 days (day) |
| 20500 gal | = 2.4585357142857E+14 weeks (wk) |
| 20500 gal | = 4715000000000 years (yr) |
| 20500 gal | = 56580000000000 months (mo) |
| 20500 gal | = 471440202916.93 decades (dec) |
| 20500 gal | = 47144020291.693 centuries (cent) |
| 20500 gal | = 4714402029.1693 millenniums (mill) |