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Cladius Ptolemy
Cladius Ptolemy, whose view of the cosmos persisted for 1,400 years. -
Jan 1, 1543
Nicolaus Copernicus
The polish astronomer Copernicus proposed in 1543 that the sun, rather than Earth, belonged in the center. Also started the scientific revolution. -
Jan 1, 1546
Tycho Brache
Studied the stars and developed better information about stars then the experts. -
Galileo Galilei
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 -
Johannes Kepler
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 -
The Soviet Union
Launched their first satellite, Sputnilk. -
Explorer 1
Explorer 1 was the first satellite that the United States launched -
Strelka and Belka
The Soviet Union Sputnik 5 was launched carrying out the first living organisms out to space two dogs named Strelka and Belka. -
First Human in Space
Yuri Gagarin was the first russian/human in space. -
Alan Shepard
First American to go to space.
