light-hour

plural light-hours

1. alternativeAlternative spelling of light hour

   With our biggest radio telescopes, largest transmitters, and most sensitive receivers, we can still barely ping the moons of Saturn, about one light-hour away.

   2014, Louis K. Scheffer, “Investigating nearby exoplanets via interstellar radar”, in International Journal of Astrobiology, volume 13, number 1, →DOI, page 62

   2 more examples

   He made calculations with pencil and paper. He would have to move the ship with extreme precision. A light-hour short of the proper distance put him too far from the sun for it to power the communicator, a light-hour beyond put him in the sun's flaming white heart. One light-hour out of eight point six light-years was approximately one part out of seventy-five thousand.

   1956 October 28, Tom Godwin, “Brain Teaser”, in Worlds of If Science Fiction, pages 78–93

   Figuring roughly, he deducted that the graph was divided into light-hours; each flickering green line was one light-hour beyond the last. Each perfect volume was one cubic light-hour.

   1972, David Gerrold, Space Skimmer, New York: Ballantine Books, page 54