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He formulated the Heliocentric model, which replaced Earth with the Sun as the center of the solar system
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He indicated new stars
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Improved telescope and discoverd phases of jupiter
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Created the laws of planetary motion
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Discovered the 4 satellites of Saturn
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created Laws of motion and gravity
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Discovered Haley's Comet
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Made the Astronimc Cadolouge conisting of nebulas and star clusters
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Discovered Uranus,Titania and Oberon
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Developed a contemporary stellar classification
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Discovered the Theroy of Relativity
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Advanced in the field extryalactic astronomy
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Searched out Extra Terestrial life
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Studied the tempuratures of Venus
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Created Gravitational singularity theorems
