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Copernicus developed the Heliocentric theory. -
Brahe discovered that there was a star that was unmoving. He also noticed that the planets orbit the sun in elliptical orbits. -
Johannes Kepler developed the three theories on planetary motion as well as worked with Tycho Brahe. -
Galileo is one of the first astronomers to observe the skies using a telescope. He also discovered the first four moons of Jupiter. -
Huygens discovered the true shape of the rings of Saturn. -
Isaac Newton is famous for many things. One of the most famous being his three laws of gravity. -
His last name may sound familiar to you. That is because Edmond Halley is the astronomer that discovered the Halley's comet. -
William Herschel is the first person to discover infrared radiation. He also discovered Uranus was a planet. -
Albert Einstein is most famous for developing the laws of relativity. -
Hubble discovered galaxies. The Hubble Telescope is named after him as well.