light-hour n.

Astronomic units of distance now in use, ‘light second’, ‘light hour’, etc., are commensurable with the units proposed, the first being one billion times the fundamental unit of length.

Nearer swept those two fleets, nearer and nearer. Twenty light-hours separated those onrushing forces, nineteen light-hours, eighteen light-hours, still were the weapons on the ships rushing outward from the galaxy silent.

When those two suns crash—well, we would never be able to escape if the space control breaks down before we are at least two light hours away!

If a broadcasting station sends out a program of one second’s duration, the length of the wave carrying that program is one light-second, or 186,270 miles. A half-hour program is on a continuous wave, as it were, one half light-hour long, and so on.

Bearing 973 galactic east, distance one point three light hours.

They wheeled around to intercept the second cruiser, by then a few light-hours away, still being harassed by fifteen enemy drones.

You come up with a figure of seven hundred twenty light-hours, right?

It was dark, too: Delta Pavonis was ten light-hours away, and the other nearby star—Hades—offered almost no light at all.

‘Here’ proved to be a spot in space approximately five and a half light-hours from an unremarkable looking, planetless M8 red dwarf.

Unexpected fringe riders are developing new ecological niches on the edge of the human information space, light-minutes and light-hours from the core, as an expansion that has hung fire since the 1970s gets under way.