Astronomy As It is Known At the Present Day With An Account of the Nature And
Astronomy As It is Known At the Present Day With An Account of the Nature And
George G Carey
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The celebrated Huygens constructed two excellent telescopes, one of twelve feet in length, and the other twenty- four, with which he discovered the fourth satellite of Saturn; which he said afterwards led him to discover the ring that surrounds that planet. Huygens was likewise the first person who applied pendulums to clocks. He died in 1695, aged 66 years. About this time the Royal Society of London, and the Royal Academy of Paris, were establish^, each of which has produced 164 HISTORY OF AS...TRONOMY. Astronomers of the first order. The first person appointed to conduct the observations at the royal observatory at Paris, was Dominic Cassini, who soon after discovered the first, second, third, and fifth satellites of Saturn. He also discovered that the planets Jupiter, Mars, and Venus, turned round their axis in a manner similar to the earth. He died in the year 1712. The successive propagation of light, one of the most curious dis- coveries in astronomy, was about this time made by Hoemer, a Danish astronomer.
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