Qu. 21. Is not this Medium [æther] much rarer within the dense Bodies of the Sun, Stars, Planets, and Comets, than in the empty celestial Spaces betw… - Isaac Newton

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Qu. 21. Is not this Medium [æther] much rarer within the dense Bodies of the Sun, Stars, Planets, and Comets, than in the empty celestial Spaces between them? And in passing from them to great distances, doth it not grow denser and denser perpetually, and thereby cause the gravity of those great Bodies towards one another, and of their parts towards the Bodies; every Body endeavouring to go from the denser parts of the Medium towards the rarer? ...And though this Increase of density may at great distances be exceeding stow, yet if the elastick force of this Medium be exceeding great, it may suffice to impel Bodies from the denser parts of the Medium towards the rarer, with all that power which we call Gravity. And that the elastic force of this Medium is exceeding great, may be gather'd from the swiftness of its Vibrations.

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About Isaac Newton

Sir Isaac Newton (January 4, 1643 – March 31, 1727 or in Old Style: December 25, 1642 – March 20, 1727) was an English mathematician, physicist, astronomer, alchemist, theologian, and author (described in his time as a "natural philosopher"), widely recognised as one of the greatest mathematicians and physicists and among the most influential scientists of all time. He was a key figure in the philosophical revolution known as the Enlightenment. His book Philosophiæ Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), first published in 1687, established classical mechanics. Newton also made seminal contributions to optics, and shares credit with German mathematician Gottfried Wilhelm Leibniz for developing infinitesimal calculus.

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Alternative Names: Sir Isaac Newton Isaacus Newtonus Isaacus Neutonus I. Newton I. Newtonius I. Neutonius Newton
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For though some stop was put to the Cataphrygian Christianity, by Provincial Councils, till the fourth century; yet the Roman Emperors then turning Christians, and great multitudes of heathens coming over in outward profession, these found the Cataphrygian Christianity more suitable to their old principles, of placing religion in outward forms and ceremonies, holy-days, and doctrines of Ghosts, than the religion of the sincere Christians: wherefore they readily sided with the Cataphrygian Christians, and established that Christianity before the end of the fourth century. By this means those of understanding, after they had been persecuted by the heathen Emperors in the three first centuries, and were holpen with a little help, by the conversion of Constantine the great and his sons to the Christian religion, fell under new persecutions, to purge them from the dissemblers, and to make them white, even to the time of the end.

As Attraction is stronger in small Magnets than in great ones in proportion to their Bulk, and Gravity is greater in the Surfaces of small Planets than in those of great ones in proportion to their bulk, and small Bodies are agitated much more by electric attraction than great ones; so the smallness of the Rays of Light may contribute very much to the power of the Agent by which they are refracted.

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