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Galileo's telescope
Galileo used the telescope to look at celestial objects and record his discovery -
Keplers laws
Keplers first and second law of planetary motions. -
Cassini discovers rings
Cassini discovers Saturns rings -
Piazzi
Piazzi discovers first ateroid, Ceres -
Red spot
Great Red Stop on Jupiter is prominent. -
Mount Willson Observeratory
The Mount Willson Observatory is established for study of the sun -
Giants and Red drwafs
Hertzsprung descirbes giant and Red Drawfs. -
Rocketry
Robert Goddard beigns practical rocketry -
Theory of Relativity
Albert Einstein introduces the Theory of Relativity -
Sputnik
Sputnik is launched into space by the Russians