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He formulated a helioenentric model of the universe
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He ade his own model of the universe caled the tychonic system
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played a major in scientific revolution
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He made the the laws of planetary motion
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He came up with the division of the rings of saturn, known as the cassini Division
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he laid the foundation for classical mechanics.
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He was best know for computing the orbit of the Eponymous Halley's comet.
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He published an astronomical cataloge consstiong of nebulae and star clusters known as the 110 messier objects
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First person to dicover the existence of infared radiation
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Created the harvard classifiation scheme
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He made the mass- energy equivelance formul for astronamy
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played a crutal role in establishing the field of extragalactic
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one of the pioneres in search for ET intellegence
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he contributed to the discovery of the high surface temperatures of venus
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came up with the hawking radiation theory
