Therefore, the time from noon to noon, when the Sun is overhead (24 hours or one day), is slightly more than the time it takes the Earth to rotate on its axis.
(the Sun; is overhead; 24 hours or one day) (the time from noon to noon, when the Sun is overhead (24 hours or one day); is; slightly more than the time)
the Sun the time from noon to noon, when the Sun is overhead (24 hours or one day)
is overhead is
24 hours or one day
slightly more than the time