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He knew that if the Earth revolved around the sun, then we should see the stars shift position throughout the year. Since he did not have the technology to detect the shift, as we do today, he concluded that the Earth must rest at the center of the universe. He figured out the Earth was spherical. Aristotle believed that the sun and stars were on separate shells that revolve around the Earth.
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He created the first star catalog. First one to come up with equinoxes. He calculated the distance from the Earth to the moon, using distance and size.
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Wrote Almagest a set of astronomy manuals which catalogues the stars, eclipses the movement of the sun and moon. His model is the geocentric theory and also called the Ptolemaic Model. He relied on Hipparchus’ astronomy work for the star catalog.
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Mathematician and astronomer and identified the concept of the Heliocentric solar system.
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Known for his accurate and comprehensive astronomical instruments and planetary observations.
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Italian Scientist considered Godfather of modern astronomy. 4 moons of jupiter
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Was a lens maker from Germany but moved to the Netherlands. Believed to be the first to apply for a patent for the telescope design of 3X magnification.
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Tycho Brahe’s assistant. Discovered that the orbit of the planets are not circular but elliptical
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Italian who discovered the division of the rings of Saturn. 4 of Saturn’s moons, and the rotation periods of Mars and Jupiter.
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Further developed works of Copernicus and Kepler using math. Invented reflecting telescope 1668
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He discovered 2 more of Saturn's moons. Believed to have found polar ice on Mars. He also found Uranus and it's moons.
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Discovered the planet Pluto and studied the “canalis” on Mars.
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He created the HR diagram. He was also a chemist and astronomer.
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Theory of Relativity and gravitation
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Using the color of the stars, discovered the universe is expanding.
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Discovered the radio waves are emanating from space.
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Russia sent the first satellite into space. It caused the US to create NASA
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First human to orbit the Earth
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1st U.S. Citizen to orbit Earth
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The Apollo program was designed to land humans on the Moon and bring them safely back to Earth.
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He was the first man to walk on the moon.
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Space Shuttle Columbia was he first reusable space craft. Launch like a rocket and land like a plane
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It took a year to get there. It was the first root rover to be on the surface of the Mars
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It orbited until crashing into Saturn. Nasa knew it would happen.
