Some clocks have seconds hands which rotate once per minute.
It rotates once each orbit, so the same side always faces the planet.
This star is rotating once every 29 days at the equator.
It takes 9.5 days for the star to rotate once around its axis.
Designed to rotate once an hour, it has sat dormant for a decade.
Mercury does have an atmosphere, and rotates once for every two of its years.
It is the Earth's surface that really moves, rotating around once per day.
The position of head teacher rotates once every two years.
Now we said that the earth rotates once in how many hours?
This asteroid rotates once every 5 days, 8 hours and 44 minutes.