This is the difference between siderealday and synodic day.
2
They'd signed up for a full siderealday -two hundred fifty-fiveEarth days.
3
Now there would be no night for a siderealday, Duchess-night flowing seamlessly into Duke-day.
4
That interval, the siderealday, lasts 23 hours, 56 minutes, and 4 seconds.
5
That is the siderealday.
6
I am concerned with the rotational rate of the Earth on its axis, so I need to use the siderealday.
7
In a vast, convulsive recession of the equinoxes, a billion siderealdays had reborn themselves, re-aligned the nebulae and island universes in their original perspectives.