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Updated: May 13, 2025
The sad contrast between the untroubled and unwearied strength of the calm heavens and the soon-exhausted strength of struggling and often beaten men strikes the poet prophet's sensitive soul. He did not know, what modern astronomy teaches us, that change, convulsions, ruin, are not confined to earth, but that stars as well as men faint and fail, dwindle and die.
They ought rather to place the Saracens by the side of their own Gothic ancestors; and making some allowance for the more advantageous circumstances under which the first started, they should view the second systematically dispersing the remains of Greek civilisation, while the first were concentrating the geometry of Alexandria, the arithmetic and algebra of India, and the astronomy of both, to form a nucleus for the present state of science."
At a certain period in the history of astronomical science, the assumption that the planets move in circles was true enough to serve the purpose of correlating such observations as were then possible; after Kepler, the assumption that they move in ellipses became true enough in regard to the state of observational astronomy at that time.
The shadow of the sun roughly gave those who were familiar with astronomy the lay of the land and the time, approximately. When the dial and the gnomon were understood, dialling became a popular science, and ere long the sundial on the church tower, in a public place, or in a private garden, told the time.
It is now necessary to leave the subject of dynamical astronomy for a short time in order to give some account of work in a different direction originated by a contemporary of Kepler's, his senior in fact by seven years. Galileo Galilei was born at Pisa in 1564.
He was willing to prove that in order to be capable of such a feat the brain would have to be as large as the cupola of the Observatory at Upsala. Humboldt, he went on to say, finally forgot his tables, and the professor of astronomy at Lund had been unable to divide two whole numbers of six figures each.
Without having acquired any notions of astronomy, without any acquaintance with the celestial charts of Flamsteed and De La Caille, he feels he is not in Europe, when he sees the immense constellation of the Ship, or the phosphorescent Clouds of Magellan, arise on the horizon. The heavens and the earth, everything in the equinoctial regions, presents an exotic character.
You all know the reply. Astronomy, which of all sciences has filled men's minds with general ideas of a character most foreign to their daily experience, and has, more than any other, rendered it impossible for them to accept the beliefs of their fathers.
Influenced by a deference, a modesty, a timidity, without any plausible motive, our artists in the last century surrendered to the English the exclusive privilege of constructing instruments of astronomy.
He was the most eloquent and accomplished prince of his time. He was skilled in many sciences, such as physic, logic, astronomy, and mathematics. He studied the philosophies and metaphysics of Greece, and was very strict in religious observances.
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