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Believed the Earth and the other planets were spheres. He also believed that the Earth was in the middle of the universe and all planets orbited around Earth.
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Greek, wrote first star catalog, calculated distance between Earth and moon.
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Wrote a book (star catalog) that included eclipses and also believed that the planets orbited Earth.
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Made the heliocentric model (sun is in the center). Made scientific method.
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Made most accurate observatory and recorded data for 20 years. Believed the universe was both ptolemaic and copernican so he thought that the planets orbited around the sun but the sun orbited around the Earth.
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Made his own telescope and found that the moon had craters, valleys and mountains. He also found sunspots on Venus and Moons orbiting Jupiter. He called the Io, Ganymede, Callisto and europa. He proved the stars did not have invisible shields and proved that not everything orbited around Earth.
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Made a telescope 3 times the magnification.
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Brahe’s assistant, also discovered the orbit of the planets were oval not circular
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Discovered the division of the rings of Saturn and 4 of Saturn’s moons. Also discovered Mars and Jupiter’s rotation periods.
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Made the 3 laws of motion. Invented reflecting telescope.
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Discovered Uranus and the two moons. He also found water on Mars and more moons on Saturn. He found out that color can be seen through a prism and temperature affects color.
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Found pluto and studied the canalis on mars. Built Lowell Observatory in Flagstaff, AZ.
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One of the inventors of the Hertzsprung_Russell diagram. Shows correlation between absolute magnitude and the spectrilight star.
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Theory of Relativity and gravitation.
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Discovered the universe is expanding using stars. Hubble’s law was galaxies are moving away from each other. The idea is the basis of the Big Bang Theory.
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Discovered the radio waves are emanating from space. Radio waves are the longest type of energy waves.
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First human to orbit Earth from Russia.
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The Soviets sent the first satellite to orbit Earth in space. Also when NASA was formed. This is when science became important in school.
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First American to orbit Earth. Orbited 3 times.
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First person to walk on the moon.
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Take people on the moon and bring them back safely.
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First American space shuttle flight. (Space stations start being built)
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To explore mars. (2 years)
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Orbited around the rings of Saturn, took 30 years.
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Rocket launched into space with a Tesla.
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