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So if we are to define the milky way we may call it 'a fringe attaching to the greatest circle, and due to the matter secreted'.
But this circle in which the milky way appears to our sight is the greatest circle, and its position is such that it extends far outside the tropic circles.
The milky way is always unchanged and among the same constellations (for it is clearly a greatest circle), whereas, since the sun does not remain in the same place, what is hidden from it differs at different times.
He established analogous results for the sphere showing that the volume of a sphere is equal to that of a cone whose height equals the radius of the sphere and whose base equals its surface area; the surface area of the sphere he found to be four times the area of its greatest circle.
The principal results in On the Sphere and Cylinder (in two books) are that the surface area of any sphere of radius r is four times that of its greatest circle (in modern notation, S = 4πr2) and that the volume of a sphere is two-thirds that of the cylinder in which it is inscribed (leading immediately to the formula for the volume, V = 4/3πr3).
Otherwise, the circular distance is the longer segment of the greatest circle.
Similar(52)
It is a great big circle...a really big one.
This great circle passes through one exclave; go there.
Navigational radio signals also follow great circle paths.
A hawk soared in a great circle around them.
The great circle route westward over the Arctic.
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