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In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10. Symbol: Y
Origin: ὀκτώ, for the eighth order of 10. The consonants ct are reduced to tt as in Italian, by analogy with peta-; the final a conforms to the finals vowel of the SI series from mega- upwards; the letter y was added, as the second term in a series running through the alphabet backwards (from zetta-).
Yotta is the largest unit prefix in the International System of Units, denoting a factor of 1024 or 1000000000000000000000000. It has the unit symbol Y. The prefix name is derived from the Greek οκτώ, meaning eight, because it is equal to 10008. It was added to the SI in 1991. Usage examples: ⁕The mass of the Earth is 5973.6 Yg or 5.9736 Zt. ⁕The mass of the oceans is about 1.4 Yg. ⁕The mass of the Moon is approximately 73.49 Yg. ⁕The total power output of the Sun is approximately 385 YW. ⁕The observable universe is estimated to be 880 Ym in diameter. ⁕One yottabyte is a unit of information or computer storage equal to one septillion bytes.
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