The number of degrees that the earth rotates about its axis in one year is the number of mean solar days in a year multiplied by the number of degrees for the earth to rotate once about its axis plus close to one degree extra for each day of the year (or adding a full 360 degrees for the year) as shown below: The number of degrees of rotation for a mean solar day would then be the total of the rotation degrees per year divided by the number of mean solar days per year shown below as: The number of mean solar hours in a sidereal day would be the ratio of sidereal degrees in a day divided by mean solar degrees in a day multiplied by the number of hours in a mean solar day, or: When used for observing the night sky, equatorially driven telescopes will track stars and other distant objects precisely when the telescope clock drive is driving the right ascension or polar axis at the sidereal rate of rotation.
(The number of degrees; rotates; about its axis in one year) (the ratio of sidereal degrees in a day; divided; by mean solar degrees; T:in a day) (a year; multiplied; by the number of degrees for the earth) (the rotation degrees per year; divided; by the number of mean solar days per year) (the telescope clock drive; is driving; the right ascension or polar axis) (a day; multiplied; by the number of hours; T:in a mean solar day) (mean solar days per year; shown; L:below) (equatorially driven telescopes; will track; stars and other distant objects; T:precisely when the telescope clock drive is driving the right ascension or polar axis at the sidereal rate of rotation; T:When used for observing the night sky)
The number of degrees the ratio of sidereal degrees in a day a year the rotation degrees per year the telescope clock drive a day mean solar days per year equatorially driven telescopes
rotates divided multiplied divided is driving multiplied shown will track
about its axis in one year
by mean solar degrees T:in a day
by the number of degrees for the earth
by the number of mean solar days per year
the right ascension or polar axis
by the number of hours T:in a mean solar day
L:below
stars and other distant objects T:precisely when the telescope clock drive is driving the right ascension or polar axis at the sidereal rate of rotation T:When used for observing the night sky