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Yotta is the largest decimal unit prefix in the metric system, denoting a factor of 1024 or . It has the unit symbol Y. The prefix name is derived from the Ancient Greek (), meaning "eight", because it is equal to 10008. It was added as an SI prefix to the International System of Units (SI) in 1991.〔(【引用サイトリンク】title=Resolution 4 of the 19th CGPM (Conférence Générale des Poids et Mesures) )〕 Usage examples: *The mass of the Earth is 5972.6 Yg. *The mass of the oceans is about 1.4 Yg. *The total power output of the Sun is approximately 385 YW.〔http://www.wolframalpha.com/input/?i=+total+power+output+of+the+Sun〕 *The observable universe is estimated to be 880 Ym in diameter.〔http://www.wolframalpha.com/input/?i=size+of+universe By a simple units conversion, 8.8×1023km = 8.8×1026m = 880×1024m = 880 Ym〕 *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 10248 bytes, which is approximately 1.2 septillion bytes. ==See also== *Metric prefix *Googol 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Yotta-」の詳細全文を読む スポンサード リンク
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