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One nanowatt is equal to one billionth of a watt.
From a single star of magnitude +3.5 a square meter receives one nanowatt.
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One microsecond equals one millionth of a second.
1 microsecond= Length of time of one commercial high-speed strobe light flash.
2.68 microseconds= the amount of time subtracted from the Earth Day as a result of the 2004 Indian Ocean earthquake. It is reported that the earthquake slightly shifted the Earth around on its axis, shortening the day by 2.68 microseconds.
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