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Mayan astronemers discover a 18.6 year cycle of the moon
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anaxagoras puts a correct explanation of the eclipse and explains the sun as a fiery mass
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plato founds a school that will influence the next 2000 years and teaches everything in the universe moves in harmony and perfect circles.
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aristarchus develops heliocentrism which puts the sun in the middle of the universe and the earth just another planet orbiting it
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galileo describes his findings with his new telescope he supports the fact of the sun being the center of the universe
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Isaac newton produces the first reflecting telescopes
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isaac newton produces his first book about gravity and the laws of motion
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Charles poduces a book about star groups and nebulas he found to stop them from being reconised as comets.
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William Herschel splits sunlight through a prism and with a thermometer
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Giuseppe locates a small object between mars and jupiter which today is a dwarf planet
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Joseph builds the first accurate spectrometer and uses it to study the spectrum of the Sun's light.
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A new planet, Neptune, is identified by German astronomer Johann Gottfried
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Konstantin Tsiolkovsky publishes his first article on the possibility of space flight.
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the Henry Draper Catalog is published. In the catalog, Annie Cannon proposes a sequence of classifying stars by the absorption lines in their spectra, which is still in use today.
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Robert Goddard launches the first rocket powered by liquid fuel. He also shows that a rocket can work in a vacuum. His later rockets break the sound barrier for the first time.