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Nicolaus Copernicus said that all the planets revolve around the sun not around the Earth.
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Discovered that comets are similar to a dirty snowball. Consisting of large amounts of ice and dust. Often with a large tail of light. He also discovered Asteroids, which ar similar to miniature planets, and meteors.
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Johannes Kepler discovered what keeps the planets orbit around the sun is their gravitational pull and inertia.
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Creates the first telescope and uses it to find new discoveries in the universe.
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Suggested that the Milky Way is a disk of stars and planets like our own.
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discoveres Uranus
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Discovers that galaxies are groups of stars like the Milky Way.
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Hubble telescope launched
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first exoplanet found orbiting a giant star.
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Pluto was defined a dwarf planet. Excluded from part of the main planets in our solar system.
