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rtlt
'rtlt' - used as a noun
1. the elapsed time it takes for a signal to travel from Earth to a spacecraft (or other body) and back to the starting point
Variations of 'rtlt'
 
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Every other artist begins with a blank canvas, a piece of paper the photographer begins with the finished product. - Click here to find out.
Fact of the day
The fastest flying butterfly is the Monarch, which has been clocked with a speed as high as 17 miles per hour.