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Claudius Ptolemy was a Greek-Roman mathematician. According to him the earth is in the middle of the solar system/geocentric.Ptolemy applied Hipparchus’s combined eccentric-epicycle-deferent model to the planets. He found that it did not work very well: it failed to predict the planets’ future movements or agree with their past movements.
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Nicolaus was a polish mathematician who formulated a model of the universe that the sun is in the middle of the solar system not the earth. But no one believed him then everything came around and people believed him.
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Galileo Galilei was an Italian astronomer he was also known as the father of modern physics. He discovered the rings around Saturn.He discovered 4 moons which are Io, Callisto, Ganymede and Europa.
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Johannes Kepler was a German mathematician, astronomer, and astrologer. He discovered the Keplerian Telescope. Apparently it was named after him.
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Edmond Halley, was an English astronomer, geophysicist, mathematician, meteorologist, and physicist. He discovered the amazing Halley's Comet
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He discovered Uranus ,Mimas, Enceladus, NGC 6251, Oberon, NGC 4473 and Titania. Frederick William Herschel was a German-British astronomer.
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The four asteroids were ceres, pallas, vesta and hygiea.Piazzi named it after Ceres, the Roman goddess of agriculture. Three other asteroids (2 Pallas, 3 Juno, and 4 Vesta) were discovered over the next few years, with Vesta found in 1807.
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Urbain Jean Joseph Le Verrier was a French mathematician. He discovered Neptune .
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Clyde William Tombaugh was an American astronomer. He discovered Pluto in 1930.The first object to be discovered in what would later be identified as the Kuiper belt.
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Voyager 1 is a space probe launched by NASA on September 5, 1977. Part of the Voyager program to study the outer Solar System, Voyager 1 launched 16 days after its twin, Voyager 2.
