Which famous astronomer (1473–1543) first proposed a model of the solar system that involved the Earth revolving around the sun
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Nicolaus Copernicus
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Born in Italy (1564–1642) this famous astronomer discovered the four primary moons of Jupiter
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Galileo Galilei
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This Italian astronomer (1625–1712) discoverd four moons of Saturn and the holes in Saturn's rings
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Giovanni Cassini
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This Dutch scientist (1629–1695) made the first observations of Saturn's rings and discovered its moon Titan
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Christiaan Huygens
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This British scientist (1656–1742) discovered that comets orbited the sun
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Edmond Halley
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This French astronomer (1730–1817) composed a database of 103 astral objects known at the time as "nebulae"
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Charles Messier
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This British astronomer (1738–1822) discovered Uranus and its two brightest moons
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William Herschel
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This German physicist (1879–1955) introduced the concept of space-time and its distortion by gravity
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Albert Einstein
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This American astronomer (1899–1953) determined that the universe was expanding
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Edwin Hubble
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This British scientist (1942-2018) proposed that, as the universe has a beginning, it will likely also end
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Stephen Hawking
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