the distance light travels in 24 hours
These were spread out over the area of a circle of nearly one light-day in diameter.
If you wish, I will prepare orbits involving maximum speeds of ten light days a minute to all the nearest stars.
One light-day out from Procyon, the thirty-third day by ship’s time since leaving Earth.
It was an insignificant run to the region of Proteus VI. The hyper-drive of the Paracelsus made the two light-day trip in a matter of subjective micro-seconds, but even so the shift required the usual preparations of banking down all electro-magnetic equipment of any kind.
There’s a planet a few light-days away from here.
A very thin line encircled the bridge: short navy-blue dashes alternating with longer pale blue dashes. The Ringworld. Or, rather, Endurance having exited hyperspace sixty light-days from its destination, the Ringworld as it had appeared sixty days earlier.
J. Lewis Burtt, "When the Universe Shrank"
Earliest cite in the OED: 1963
Last modified 2021-10-18 22:56:17
In the compilation of some entries, HDSF has drawn extensively on corresponding entries in OED.