Definitions
There is 1 meaning of the phrase
Light Hour.
Light Hour - as a noun
The distance light travels in a vacuum in one hour; approximately one billion kilometers
Example Sentences
"A light hour is a unit of length equal to the distance light travels in one hour, approximately 1.079 billion kilometers."
"The nearest star system to Earth, Alpha Centauri, is about 4.37 light hours away."
"The radio signals from Earth take about 8 light hours to reach the Voyager 1 spacecraft."
"A light hour is equivalent to 60 light minutes."
"One light hour is about 670,616,629.384 miles."
