Yotta-

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Yotta is the largest unit prefix in the International System of Units (SI) denoting a factor of 10²⁴ or 1000000000000000000000000. It has the unit symbol Y.

The prefix name is derived from the Greek ὀκτώ (októ), meaning eight, because it is equal to 1000⁸. It was added to the SI in 1991.

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

Usage examples:

The mass of the Earth is 5973.6 Yg (or 5.9736 Zt).
The mass of the ocean is about 1.4 Yg.
The mass of the Moon is approximately 74.477 Yg.
The total power output of the Sun is approximately 385 YW.
The known universe is estimated to be 880 Ym in diameter.
One yottabyte is a unit of information or computer storage equal to one septillion bytes.

References

^ "Resolution 4 of the 19th CGPM (Conférence Générale des Poids et Mesures)". BIPM (Bureau International des Poids et Mesures). http://www.bipm.org/en/CGPM/db/19/4/.
^ Williams, David R. (2004-09-01). "Earth Fact Sheet". NASA. http://nssdc.gsfc.nasa.gov/planetary/factsheet/earthfact.html. Retrieved 2007-03-17.
^ http://hypertextbook.com/facts/2002/SamanthaDong2.shtml
^ Kennish, Michael J. (2001). Practical handbook of marine science. Marine science series (3rd ed.). CRC Press. p. 35. ISBN 0-8493-2391-6.
^ Wieczorek, M.; et al. (2006). "The constitution and structure of the lunar interior". Reviews in Mineralogy and Geochemistry 60 (1): 221–364. doi:10.2138/rmg.2006.60.3.
^ http://www.wolframalpha.com/input/?i=+total+power+output+of+the+Sun
^ http://www.wolframalpha.com/input/?i=size+of+universe By a simple units conversion, 8.8×10²³km = 8.8×10²⁶m = 880×10²⁴m = 880 Ym