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Formulated a heliocentric model of the universe.
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Astronomical and planetary observatiaons.
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Improve the telescope.
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Laws of planetary motion.
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Discovered 4 satellites of the planet Saturn work in the fields of astronomy and engineering.
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Formulated the laws of motion and universal gravitation.
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Computing the orbit of the eponymous Halley's comet.
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Publishing an astronomical cataogue.
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Discovered Uranus.
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Harvard dassification scheme.
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General theory of reativity.
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established the field of extragalactic astronomy.
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Search for extraterrestrial intelligence.
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Discovery of the high sulface temperaures of Venus.
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Collaborated with Roger Penrose on gravitational singularity theorems.
