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384/322 Aristotle is a Greek philosopher and a scientist. He also was a teacher and taught many adults and kids.
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168/100 Ptolemy was a king and a writer. Ptolemy counted the stares and the planets. He studyed outer space and tought people about it.
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1473/1543 Polish scientist Nicolaus Copernicus proposed that the planets instead revolved around the sun. He also studed the earth sun and the other planets
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1546/1601 Tycho Brahe was a astronomer who found out more about outer space. He found a new understanding for the planets moons and stars.
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1564/1642 Galileo was a inventor and astronomer. he wrote laws of motion and learned about it. He invented the teliscope
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1570/1619 He was a astronomer and invented a different telescope
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1571/1630 Johannes Kepler was a German astronomer who found out that the planets orbit the sun/ the laws of planetary motion. He also found out the time it takes planets to move around the sun.
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1625/1712 He was a astronomer who found 4 of Saturns moons he also found that there is a gap between saturns rings.
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1643/1724 He discoverd the composition of white light. Also the Phenomena of colors. Also learned about gravity and how it works.
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1738/1822 He discoverd the planet Uranus and many moons on gas Giants.
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1855/1916 He was a American astronomer that studed the planets and he said there is other planets not in are soler system.
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1873/1967 Ejnar Hertzsprung was a Danish chemist and astronomer who photograph star light.
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1879/1955 Albert Einstein was a teacher also discovered the equation that helped explain special relativity.
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1889 Using the color of the stars,discovered the universe is expanding which is called hubble’s law
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He created the radio telescope and he was the first radio astronomer and he discovered radio waves emanating from the milky way
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It was a Soviet probe that was described as a silver basketball and it was the first satalite in space.
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He was the first man to go reach space on board 3KA-3 spacecraft
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He was the first man to orbit the earth
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He was the first man on the moon and he made the quote “that is one step for a man and one giant leap for mankind”
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The first shuttle in space for research on the stars moons and planets.
