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322 BCE
Aristotle
Aristotle: He was born in 384 B.C and was died in 322 B.C. He proved earth and other planets were spherical. He believed that earth was center of universe. He believed that the sun, moon, and planets were in clear shells that moved around earth. -
170 BCE
Ptolemy
Ptolemy: He was born in 100 A.D. and died in 170 A.D. The sun, moon, planets, and stars must travel in uniform motion. -
120
Hipparchus
Hipparchus: He was born in 190 B.C. and died in 120 B.C. He came up with the first star catalogue. He discovered the equinoxes. -
1543
Corerincus
Corerincus: He was born in 1473 and he died in 1543. He made a model that positioned the sun near the center of the universe. He had the planets and the rest orbiting the sun. -
Tycho Brahe
Tycho Brahe: He was born in 1546 and he died in 1601. He is accurate and comprehensive space timing -
Hans Lippershay
Hans Lippershey: He was born in 1570 and died in 1619. He was a lense maker from germany but moved to the Netherlands. Believed to be the first to apply for a patent for the telescope design of 3X magnification. -
Johannes Kelper
Johannes Kepler: He was born in 1571 and died in 1630. He was Tycho Brahe’s assistance. Discovered that the orbit of the planets are not circular but elliptical (oval). Unification of astronomy and physics. -
Gallipoli
Gallipoli: He was born in 1564 and died in 1642. He discovered the spots on sun and the mountains on the moon. He also proved stars were not fixed to invisible shells. He discovered Jupiter's main moons witch are Io, Europa, Ganymede, and Callisto. -
Yuri Gagarin
Yuri Gagarin: He was born in 1934 and he died in 1668. He was the first human to orbit earth in 1961. -
Giovanni Cassini
Giovanni Cassini: He was born in 1625 and he died in 1712. He discovered the division of the rings of Saturn's. 4 of Saturn's moons, and the rotation of Mars and Jupiter. -
Sir Isaac Newton
Sir Isaac Newton: He was born in 1643 and died in 1727. He formulated the law of gravitation and discovered the 3 laws of motion. He invented reflecting telescope -
William Herschel
William Herschel: He was born in 1738 and he died in 1822. He discovered Uranus and its moon, 2 more of Saturn's moons. He performed an experiment that determined the temp. of sunlight passing through a prism. He found that every color is a different length. -
Percival Lowell
Percival Lowell: He was born in 1855 and died in 1916. He discovered the planet and studied the “canals” on Mars. He built the Lowell observe in Flagstaff to study Mars. -
Karl Jansky
Karl Jansky: He was born in 1905 and died in 1950. Discovered radio waves emanating from milky way. -
Edwin Hubble
Edwin Hubble: He was born in 1889 and died in 1953. He used the color of the stars, discovered the universe is expanding. Hubble's law, galaxies are moving away from each other. The idea of the big Bang Theory of how the universe began. -
Albert Einstein
Albert Einstein: He was born in 1879 and died in 1955. He had the theory of Relativity and gravitation. -
Sputnik
Sputnik: This happened in 1957. In the midst of the cold war, Russia was successful in launching the first satellite into space to orbit earth. Putting Soviet Union ahead of the United states. Science and space travel become Dwight Eisenhower created NASA. -
Ejnar Hertzsprung
Ejnar Hertzsprung: He was born in 1873 and died in 1967. One of the inventors of Hertzsprung_Russell diagram. The HR diagram shows the correlation between the absolute magnitude (brightness) and the spectral type of star. -
Neil Armstrong
Neil Armstrong: He was born in 1930 and he died in . He was the first one to walk in the moon -
John Glenn
John Glenn: He was born in 1921 and he died in 2016. He was first american to orbit earth in 1962 and he did it 3 times before he died.
