Correction for the length of a Grain of Sand
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How long is 0.00000000000000000001000 light years?
It's about one-fifteenth as long as a Grain of Sand
The length of a Grain of Sand is about 0.0000000000000000001320 light years.
(medium grain)
Composed mainly of quartz, mica, feldspar, or magnetite, a grain of sand measures an average of 0.0000000000000000001320 light years. In 2007, a team of seven in Myrtle Beach created the world's tallest sandcastle, which measured 0.00000000000000160 light years in height.