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1998-04-25
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// Astronomy
#ad
// 15th century
#p <o>astronomer<nat>Polish<n>Nicolaus Copernicus<b>1473 Feb 19<d>1543
// 16th century
#p <o>astronomer<nat>Danish<n>Tycho Brahe<b>1546<d>1601
#p <o>astronomer<nat>Italian<o>physicist<n>Galileo Galilei<sur>Galileo<b>1564 Feb 15<d>1642
#p <o>astronomer<nat>German<n>Johannes Kepler<b>1571 Dec 27<d>1630
#e <t>pub<au>Copernicus<n>heliocentric theory<d>1543
// 17th century
#p <o>astronomer<nat>Danish<n>Ole Roemer<b>1644 Sep 25<d>1710
#p <o>astronomer<nat>English<n>Edmund Halley<b>1656 Nov 8<d>1742
#e <t>theory<au>Kepler<n>laws of planetary motion<d>1609
#e <t>obs<au>Galileo<n>Jupiter's four large moons<d>1610 Jan 7
#e <t>pub<au>Galileo<tit>Dioptrice<d>1611
#e <t>obs<au>Roemer<n>speed of light measured to within 50%<d>1675
// 18th century
#p <nat>Swedish<o>astronomer<n>Anders Celsius<b>1701 Nov 27<d>1744
#p <nat>English<o>astronomer<n>William Herschel<b>1738<d>1822
#p <nat>English<o>astronomer<n>Sir John Herschel<b>1792<d>1871<fa>William Herschel
#e <t>obs<n>Uranus<d>1781 Mar 13<au>William Herschel
// 19th century
#e <t>obs<n>asteroid 1 Ceres<d>1801 Jan 1<info>the largest and first discovered asteroid<info>discovered by G. Piazzi
#e <t>obs<n>asteroid 2 Pallas<d>1802 Mar<info>the 2nd largest asteroid and 2nd asteroid discovered<info>discovered by Heinrich Olbers
#e <t>obs<n>asteroid 3 Juno<d>1804<info>the 3rd asteroid discovered<info>discovered by K. Harding
#e <t>obs<n>asteroid 4 Vesta<d>1845<info>the 3rd largest asteroid<info>Vesta appears to have a basaltic crust overlying an olivine mantle.
#e <t>obs<n>asteroid 5<d>1845<info>discovered by Karl Hencke
#e <t>obs<n>Neptune<d>1846 Sep 23
#e <t>obs<d>1877<n>Phobos and Deimos<c>U.S.<info>Asaph Hall, of U.S. Naval Observatory, discovers Mars' two moons.
// 20th century
#e <t>obs<n>Pluto<d>1930 Feb 18<info>by Clyde Tombaugh
#e <t>obs<n>Dactyl, satellite of asteroid 243 Ida<d>1993 Aug 28<info>imaged by Galileo probe