elapsed time

1. The time that elapses while some event is occurring (synset 115156075)
   is a type of: period, period of time, time period - an amount of time
   subtypes:

   • one-way light time, owlt - the elapsed time it takes for light (or radio signals) to travel between the Earth and a celestial object
   • round-trip light time, rtlt - the elapsed time it takes for a signal to travel from Earth to a spacecraft (or other body) and back to the starting point

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