The length of the natural solar year (the time it takes for the earth to make one orbit of the sun) was estimated to be 365 days and 6 hours.
(the earth; to make; one orbit of the sun) (The length of the natural solar year; to be; 365 days and 6 hours)
the earth The length of the natural solar year
to make to be
one orbit of the sun
365 days and 6 hours