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{{Wiktionary|yotta-}}
one yotta is 1000 zetta (in data storage, 1024 zettabytes is a yottabyte
'''Yotta''' is the largest [[decimal]] [[Unit of measurement|unit]] prefix in the [[metric system]], denoting a factor of [[Orders_of_magnitude (numbers)#1024|10<sup>24</sup>]] or {{gaps|1|000|000|000|000|000|000|000|000}}; that is, one million million million million, or one septillion. It has the unit symbol '''Y'''. The prefix name is derived from the [[Ancient Greek]] {{lang|grc|οκτώ}} ({{lang|grc-Latn|októ}}), meaning "eight", because it is equal to 1,000<sup>8</sup>. It was added as an [[SI prefix]] to the [[International System of Units]] (SI) in 1991.<ref>{{cite web|url=http://www.bipm.org/en/CGPM/db/19/4/|title=Resolution 4 of the 19th CGPM (Conférence Générale des Poids et Mesures)|publisher=BIPM (Bureau International des Poids et Mesures)
}}</ref>

Usage examples:
*The mass of the [[Earth]] is 5,972.6&nbsp;Yg.<ref name="Earth fact sheet">{{cite web|last1=Williams|first1=David R.|title=Earth fact sheet|url=http://nssdc.gsfc.nasa.gov/planetary/factsheet/earthfact.html|website=Earth fact sheet|publisher=NASA|accessdate=31 October 2015|ref=2}}</ref>
*The mass of the [[ocean]]s is about 1.4&nbsp;Yg.<ref>{{cite book
| first=Michael J. | last=Kennish | year=2001
| title=Practical handbook of marine science
| page=35 | edition=3rd | publisher=CRC Press
| series=Marine science series | isbn=0-8493-2391-6 }}</ref>
*The total power output of the [[Sun]] is approximately 385&nbsp;YW.<ref>http://www.wolframalpha.com/input/?i=+total+power+output+of+the+Sun</ref>
*The [[observable universe]] is estimated to be 880&nbsp;Ym in diameter.<ref>http://www.wolframalpha.com/input/?i=size+of+universe By a simple units conversion, 8.8×10<sup>23</sup>km = 8.8×10<sup>26</sup>m = 880×10<sup>24</sup>m = 880 Ym</ref>
*One [[yottabyte]] (YB) is a unit of digital information or information storage capacity that contains one septillion bytes or 1,000 [[zettabyte]]s. The [[yobibyte]] (YiB) is a related unit that uses a [[binary prefix]], and means 1,024<sup>8</sup> bytes, which is approximately 1.2 septillion bytes.

==Related pages==
*[[Metric prefix]]
*[[Googol]]

==References==
{{reflist}}

==Other websites==
{{Wiktionary|yotta-}}
*[http://www.bipm.org/en/home/ BIPM website]

[[Category:SI units]]

Revision as of 15:28, 18 December 2018

Yotta is the largest decimal unit prefix in the metric system, denoting a factor of 1024 or 1000000000000000000000000; that is, one million million million million, or one septillion. It has the unit symbol Y. The prefix name is derived from the Ancient Greek οκτώ (októ), meaning "eight", because it is equal to 1,0008. It was added as an SI prefix to the International System of Units (SI) in 1991.[1]

Usage examples:

  • The mass of the Earth is 5,972.6 Yg.[2]
  • The mass of the oceans is about 1.4 Yg.[3]
  • The total power output of the Sun is approximately 385 YW.[4]
  • The observable universe is estimated to be 880 Ym in diameter.[5]
  • One yottabyte (YB) is a unit of digital information or information storage capacity that contains one septillion bytes or 1,000 zettabytes. The yobibyte (YiB) is a related unit that uses a binary prefix, and means 1,0248 bytes, which is approximately 1.2 septillion bytes.

References

  1. "Resolution 4 of the 19th CGPM (Conférence Générale des Poids et Mesures)". BIPM (Bureau International des Poids et Mesures).
  2. Williams, David R. "Earth fact sheet". Earth fact sheet. NASA. Retrieved 31 October 2015.
  3. Kennish, Michael J. (2001). Practical handbook of marine science. Marine science series (3rd ed.). CRC Press. p. 35. ISBN 0-8493-2391-6.
  4. http://www.wolframalpha.com/input/?i=+total+power+output+of+the+Sun
  5. http://www.wolframalpha.com/input/?i=size+of+universe By a simple units conversion, 8.8×1023km = 8.8×1026m = 880×1024m = 880 Ym

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