Light Second
Light Second :
A unit of distance equal to the distance light travels in a vacuum in one second. In accordance with the official definition of the meter, this distance is exactly 299 792 458 meters (about 186 282.4 miles). Similarly, a light minuteis 60 light seconds (about 17 987 547 kilometers or 11 176 944 miles) and a light day is 1440 light minutes (about 25.902 billion kilometers or 16.095 billion miles)
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