The mean distance from the Atlantic to the Mississippi does not probably exceed seven hundred and fifty miles.
Its angular diameter at mean distance is 31′ 5″, or, say, just over ½°.
Saturn revolves round the Sun in a little under 29½ years at a mean distance of 886 millions of miles.
That the mean distance of the planet cannot be less than 35 or more than 37.9.
Having determined the periodic time, the mean distance, or semi-axis major, is found by Kepler's third law to be 10.34.
When the angle is 90°, the effect is least, and the mean distance least.
It has been calculated that the whites advance a mean distance of seventeen miles along the whole of this vast boundary.
The mean distance apart will be about twenty to twenty-five miles.
On the orbit of the moon, at its mean distance from the earth, each of these straight sides would be about 6,000 feet long.
The square of the time of revolution (or year) of each planet is proportional to the cube of its mean distance from the sun.