The work of Johannes Hevelius--Halley and Hevelius--Halley's observation of the transit of Mercury, and his method of determining the parallax of the planets--Halley's observation of meteors--His inability to explain these bodies--The important work of James Bradley--Lacaille's measurement of the arc of the meridian--The determination of the question as to the exact shape of the earth--D'Alembert and his influence upon science--Delambre's History of Astronomy--The astronomical work of Euler. The work of William Herschel--His discovery of Uranus--His discovery that the stars are suns--His conception of the universe--His deduction that gravitation has caused the grouping of …
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