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Yotta-

 
Computer Desktop Encyclopedia: yotta
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Septillion (10 to the 24th power). See space/time.

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yotta (symbol Y) is a prefix in the International System of Units (SI) denoting a factor of 1024 or 1000000000000000000000000.

Added to the SI in 1991, it is derived from the Greek ὀκτώ (októ)[citation needed], meaning eight, because it is equal to 10008.

Before the adoption of the yotta prefix, the multiple was also known as otta.

Examples:

  • the mass of the Earth is 5973.6 Yg[1][2] (although as large mass units are based on the tonne, this would be more likely expressed as 5.97 Zt).
  • the total power output of the Sun is approximately 383 YW.
  • the known universe is estimated to be 880 Ym in diameter.
  • the average power released by Tsar Bomba was 5.4 YW[citation needed]
SI prefixes
1000m 10n Prefix Symbol Since[1] Short scale Long scale Decimal
10008 1024 yotta Y 1991 Septillion Quadrillion 1000000000000000000000000
10007 1021 zetta Z 1991 Sextillion Trilliard 1000000000000000000000
10006 1018 exa E 1975 Quintillion Trillion 1000000000000000000
10005 1015 peta P 1975 Quadrillion Billiard 1000000000000000
10004 1012 tera T 1960 Trillion Billion 1000000000000
10003 109 giga G 1960 Billion Milliard 1000000000
10002 106 mega M 1960 Million 1 000 000
10001 103 kilo k 1795 Thousand 1000
10002⁄3 102 hecto h 1795 Hundred 100
10001⁄3 101 deca da 1795 Ten 10
10000 100 (none) (none) NA One 1
1000−1⁄3 10−1 deci d 1795 Tenth 0.1
1000−2⁄3 10−2 centi c 1795 Hundredth 0.01
1000−1 10−3 milli m 1795 Thousandth 0.001
1000−2 10−6 micro µ 1960[2] Millionth 0.000001
1000−3 10−9 nano n 1960 Billionth Milliardth 0.000000001
1000−4 10−12 pico p 1960 Trillionth Billionth 0.000000000001
1000−5 10−15 femto f 1964 Quadrillionth Billiardth 0.000000000000001
1000−6 10−18 atto a 1964 Quintillionth Trillionth 0.000000000000000001
1000−7 10−21 zepto z 1991 Sextillionth Trilliardth 0.000000000000000000001
1000−8 10−24 yocto y 1991 Septillionth Quadrillionth 0.000000000000000000000001
  1. The metric system was introduced in 1795 with six prefixes. The other dates relate to recognition by a resolution of the CGPM.
  2. The 1948 recognition of the micron by the CGPM was abrogated in 1967.

See also

References

  1. ^ Williams, David R. (2004-09-01). "Earth Fact Sheet". NASA. http://nssdc.gsfc.nasa.gov/planetary/factsheet/earthfact.html. Retrieved 2007-03-17. 
  2. ^ http://hypertextbook.com/facts/2002/SamanthaDong2.shtml

External links


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