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Length/Distance | Convert from button measure to light year |
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Common Length Conversions Metric Length Conversions Unit Definition (button measure) The button measure is a unit of distance equal to 1/40 inch (0.635 millimeter), used to measure the thickness of buttons. Unit Definition (light year) The distance that light, moving at a constant speed of 300,000 km/s, travels in one year. One light year is about 10 trillion kilometers.
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