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The earth also is spherical, since it presses upon its center from every direction.

Until very recently, the heavenly bodies have been investigated only with reference to their position and their laws of motion, and a quarter of a century ago astronomy was little more than celestial topography.

First of all, we must note that the universe is spherical.

Now it is quite clear to me that there are no solid spheres in the heavens, and those that have been devised by the authors to save the appearances, exist only in the imagination.

I can calculate the motion of heavenly bodies, but not the madness of people.

Thanks to the fact that the Earth isn't a perfect sphere, and invoking a bunch of Newtonian physics, you can deduce that our planet wobbles, too, taking roughly 26,000 years to trace out a small circle on the sky, a phenomenon known as precession.

Planets' orbits are elliptical. It's a very pleasing shape.

Gravity may put the planets into motion, but without the divine Power, it could never put them into such a circulating motion as they have about the Sun; and therefore, for this as well as other reasons, I am compelled to ascribe the frame of this System to an intelligent Agent.

Sooner and later you will see great changes made, dreadful horrors and vengeances. For as the Moon is thus led by its angel, the heavens draw near to the Balance.

Nature is an infinite sphere of which the center is everywhere and the circumference nowhere.