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Chinese recorded 900 solar eclipses and 600 lunar eclipses over 2600 years.
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Used Earths shadow on the moon, including during the lunar eclipses, to prove that the Earth was a sphere.
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The model said that all planets and stars obrited around the earth and accurately predicted the positions of the planets.
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Oresme explains that we perceive relative motion. Day motion of the stars can be explained by the rotation of the Earth.
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De Revolutionibus is Capernicus' description of the Heliocentric Model of the solar system. The Heliocentric Model states that everything orbits around the sun.
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Hans Lippershey was the first to apply for the patent for the invention of the telescope. He claimed that the device had three-times magnification. Galileo then created his own version of the telescope, without ever seeing one. He made some improvements and presented it to the Senate for military use, which boosted his salary. Galileo, though, was the first to point it at the sky.
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Galileo didnt invent the telescope, but he was the first to examine everything around us using the telescope.
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The book described his discoveries about gravity, motion, and the orbits of the planets.
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While measuring the direction and brightness of the stars, Herschel found a fuzzy spot that moved among the stars. This was Uranus, which was not known the acients.
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Discrepancies in Uranus' orbit prompt the discovery of Neptune by Adams and Leverrier
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Huggins studied the spectra of bright stars and found that the dark lines in their spectra matched the wavelengths of atoms measured in terrestrial laboratories.
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Einstein discovers that light emission at small wavelengths happens because of small particles called photons
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Einstein explained that matter curves space, causing bodies to move in ways we attribute to gravity.
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Shapley assumed that globular clusters are distributed uniformly about the center of the Milky Way. From this, he found that the Earth is located 15,000 pc from the center of the Milky Way.
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Tombaugh discovered Pluto by comparing photographic plates taken of the same region of the sky about a week apart. Pluto's image moved among the stars. Later though, Pluto was considered to not be a planet.
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Mariner 4 sent back pictures of Mars that showed a planet whose surface resembled that of the Moon.
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On July 20, 1969 Aldrin and Armstrong became the first people to land on the Moon.
