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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.
A decade is a period of 10 years. The word is derived from the Ancient Greek: δεκάς (transliteration=dekas), which means a group of ten. Other words for spans of years also c ..more definition+
In relation to the base unit of [time] => (seconds), 1 Galactic Years (gal) is equal to 7.25328E+15 seconds, while 1 Decades (dec) = 315400000 seconds.| 100 Galactic Years | to common time units |
|---|---|
| 100 gal | = 7.25328E+17 seconds (s) |
| 100 gal | = 1.20888E+16 minutes (min) |
| 100 gal | = 2.0148E+14 hours (hr) |
| 100 gal | = 8395000000000 days (day) |
| 100 gal | = 1199285714285.7 weeks (wk) |
| 100 gal | = 23000000000 years (yr) |
| 100 gal | = 276000000000 months (mo) |
| 100 gal | = 2299708306.9119 decades (dec) |
| 100 gal | = 229970830.69119 centuries (cent) |
| 100 gal | = 22997083.069119 millenniums (mill) |