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Cladius Ptolemy, whose view of the cosmos persisted for 1,400 years.
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The polish astronomer Copernicus proposed in 1543 that the sun, rather than Earth, belonged in the center. Also started the scientific revolution.
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Studied the stars and developed better information about stars then the experts.
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Italian astronomer, physicist, engineer, philosopher, and mathematician. Of all of his telescope discoveries, he is perhaps most known for his discovery of the four most massive moons of Jupiter
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Famous for mathematician, astronomer, and astrologer. Also created the theory of ovoid movements of the planets around the sun. The first astronomer to state the fundamental laws of planetary motion
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Launched their first satellite, Sputnilk.
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Explorer 1 was the first satellite that the United States launched
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The Soviet Union Sputnik 5 was launched carrying out the first living organisms out to space two dogs named Strelka and Belka.
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Yuri Gagarin was the first russian/human in space.
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First American to go to space.
