1993 Jean Mueller discovers comet Mueller/1993a
1992 Tsuruhiko Kiuchi discovers comet Swift-Tuttle
1992 David Lewett and Jane Luu discovers comet: "1992 QB1" 64 mil km from Sun
1992 Peter Collins discovers nova Cygni 1992
1989 Voyager 2 discovers 2 partial rings of Neptune
1980 Voyager 1 space probe discovers 15th moon of Saturn
1979 Pioneer 11 makes 1st fly-by of Saturn, discovers new moon, rings
1974 Charles Kowal discovers Leda, 13th satellite of Jupiter
1968 Jocelyn Bell discovers 1st pulsar
1966 Audouin Dollfus discovers 10th satellite of Saturn, Janus
1963 Maarten Schmidt discovers enormous red shifts in quasars
1959 Dr. Leakey discovers oldest human skull (600,000 years old)
1958 James van Allen discovers radiation belt
1956 Dr. Albert Sabin discovers oral polio vaccine
1955 University of California discovers anti-proton
1951 S. B. Nicholson discovers 12th satellite of Jupiter
1949 Gerard Kuiper discovers Nereid, (2nd satellite of Neptune)
1943 RAF discovers Werner von Brauns V1/V2-base in Peenemunde
1942 J. S. Hey discovers radio emissions from Sun
1934 Wiley Post discovers jet stream
1930 U.S. astronomer Clyde Tombaugh discovers Pluto
1928 Alexander Fleming discovers penicillin
1922 Howard Carter discovers tomb of Tutankhamen in Egypt
1911 Hiram Bingham discovers Lost City of the Incas
1909 Word received, Adm Peary discovers North Pole 5 months earlier
1906 Roald Amundsen discovers Magnetic South Pole
1903 Dr. Harry Plotz discovers vaccine against typhoid in New York City
1900 Giacobini discovers a comet (will be 1st comet visited by spacecraft)
1898 Scientists Pierre and Marie Curie discovers radium
1896 German physicist Wilhelm Roentgen's discovers x-rays
1895 Wilhelm Roentgen (Germany) discovers X-rays
1892 E E Barnard at Lick discovers Amalthea, 5th Jupiter moon
1882 Dr. Robert Koch discovers germ that causes tuberculosis
1882 German scientist Robert Koch discovers bacillus cause of TB
1879 Constantine Fahlberg discovers saccharin the artificial sweetener
1877 Asaph Hall discovers Mars' moon Phobos
1877 Asaph Hall discovers Mars's moon Deimos
1871 Jules Janssen discovers dark lines in solar corona spectrum
1870 Heinrich Schliemann discovers Troi
1868 Pierre Janssan discovers helium in solar spectrum during eclipse
1868 Leon Foucault, discovers 1st physical proof of Earth's rotation, dies
1864 William Huggins discovers chemical composition of nebulae
1862 Telescope maker Alvin Clark discovers dwarf companion of Sirius
1861 Leipzig Observatory discovers short-period (6.2 yrs) Comet d'Arrest
1859 Wilhelm Tempel discovers diffuse nebula around Pleid star Merope
1859 Capt N. C. Brooks discovers Midway Islands
1856 Dr. John A Veatch discovers borax, Tuscan Springs, California
1851 William Lassell discovers Ariel and Umbriel, satellites of Uranus
1851 John F. Loudon discovers tin on East Indian Island of Billiton
1849 M Jolly-Bellin discovers dry-cleaning, he accidentally upset lamp containing turpentine and oil on his clothing and sees cleaning effect
1847 Maria Mitchell discovers a non-naked-eye comet
1847 German astronomer Theodor discovers Comet Brorsen-Metcalf
1840 American Charles Wilkes discovers Shackleton Ice Shelf, Antarctica
1840 Dumont D'Urville discovers Adelie Land, Antarctica
1826 M Biela, an Austrian officer, discovers Biela's Comet
1821 Bellingshausen discovers Alexander Island off Antarctica
1820 Edward Bransfield aboard Williams discovers Antarctica (UK claim)
1815 George Evans discovers Lachlan River, Australia
1801 French astronomer Jean-Louis Pons discovers his 1st comet
1800 James Ross discovers North Magnetic pole
1792 George Vancouver discovers site of Vancouver BC
1792 Capt Robert Gray discovers Grays Harbor (Washington)
1791 Danish navigator Vitus Jonas Bering discovers Alaska
1791 Jose Maria Narvaez discovers Point Grey (now Vancouver BC)
1789 William Herschel discovers Mimas, satellite of Saturn
1789 Sir William Herschel discovers Saturn's moon Enceladus
1787 W Herschel discovers Enceladus, a moon of Saturn
1781 Andre Mechain discovers M80 (globular cluster in Scorpio)
1780 William Herschel discovers 1st binary star, Xi Ursae Majoris
1778 Capt Cook discovers Maui (Sandwich Islands [now Hawaii])
1774 Priestly discovers oxygen
1774 Joseph Priestley discovers oxygen
1772 Yves de Kerguelen of France discovers Kerguelen Archipelago, India
1770 Capt. James Cook discovers Great Barrier Reef off Australia
1770 Capt James Cook discovers Botany Bay (Australia)
1741 Capt Bering discovers Mount St. Elias, Alaska
1739 J B C Bouvet de Lozier discovers Bouvet Island, near Antarctica
1722 Jacob Roggeveen discovers Easter Island
1672 Giovanni Cassini discovers Rhea, a satellite of Saturn
1671 Giovanni Cassini discovers Iapetus, satellite of Saturn
1655 Christiaan Huygens discovers Titan, (Saturn's largest satellite)
1642 Abel Janzoon Tasman discovers Van Diemen's Land (Tasmania)
1642 Christiaan Huygens discovers Martian south polar cap
1618 Johannes Kepler discovers harmonics law
1616 VOC-ship "The Eendracht" discovers Dirk-Hartogeiland, Australia
1616 Jacques Le Maire discovers Street Lemaire/Cape Receiver
1610 Galileo Galilei discovers Callisto, 4th satellite of Jupiter
1610 Galileo discovers 1st 3 Jupiter satellites, Io, Europa and Ganymede
1610 German astronomer Simon Marius 1st discovers the Jupiter moons, but does not officially report it, Galileo does on July 1 1610
1609 Henry Hudson, discovers and explores Delaware Bay
1596 David Fabricius discovers light variation of Mira (1st variable star)
1595 Alvara Mendana discovers Marquesas Island
1585 English secret service discovers Anthony Babingtons murder plot against queen Elizabeth I
1578 William Harvey of England discovers blood circulation
1542 Juan Rodriguez Cabrillo discovers California, at San Diego Bay
1541 Hernando de Soto discovers Mississippi River
1539 Spanish explorer Fernando de Soto discovers Florida
1535 Jacques Cartier discovers Mount Royal (Montreal)
1535 Bishop Tomas de Berlanga discovers Galapagos Islands
1534 Jacques Cartier discovers Prince Edward Islands Canada
1524 Giovanni Verrazano, a florentine navigator, discovers New York Bay
1521 Ferdinand Magellan discovers the Philippines
1521 Magelhaes' fleet discovers Zamal (Samar)
1521 Magellan discovers Guam
1513 Spaniard Juan Ponce de Leon discovers Florida
1503 Columbus discovers Cayman Islands
1502 Portuguese Admiral Da Nova discovers St. Helena
1501 Joao da Nova Castell discovers Ascension Islands
1500 Diego Diaz discovers Madagascar
1500 Pedro Alvarez Cabral discovers Brazil and claims it for Portugal
1499 Alonso dhe Ojeda discovers Curacao Island
1498 Christopher Columbus discovers island of Trinidad
1494 Columbus discovers Jamaica
1493 Christopher Columbus discovers Puerto Rico, on his 2nd voyage
1493 Columbus discovers Saba
1493 Christopher Columbus discovers island of Dominica
1493 Christopher Columbus discovers island of Dominica
1492 Columbus discovers Hispaniola (El Espanola/Haiti)
1492 Christopher Columbus discovers Cuba and claims it for Spain
1492 Columbus' discovers America (Oct 12, 1492 Julian calender)
1488 Bartholomeus Diaz discovers Mosselbaai (Angra dos Vaqueros)
1000 Leif Ericson discovers "Vinland" (possibly New England)
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