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14 Cards in this Set
- Front
- Back
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Nebular Theory
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The sun and planets formed from a rotating disk of dust and gases
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Jovian Planets
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Huge gas plants
Orbits far apart Less dense Rotates on axis faster Thick atmosphere Gases, liquids, ices Jupiter, Saturn, Uranus, Neptune |
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Terrestrial Planets
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Small and rocky
Planets have smaller diameter HIgh density Thin to no atmosphere Rotates on axis slowly Few gases and ices Mercury, Venus, Earth, Mars |
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Isaac Newton
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Law of Universal Gravitation
Gravity of earth holds earth and moon in it's orbit |
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Ptolemy
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Retrogrande motion (moving backwards in the sky)
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HIpparchus
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Star catalog *850*
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Eratosthenes
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Circumference of Earth
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Aristotle
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Earth is round (casted a curved shadow on moon)
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Order of planets distance from sun
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Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
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Heliocentric
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Sun is the center of the universe
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Geocentric
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The earth is the center of the universe
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Copernicus
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Concluded that earth was a planet no the center of the universe. Proposed the heliocentric (sun-centered model)
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Johannes Kepler
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Formulated the 3 laws of Planetary motion
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Galileo Galilei
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Invented the telescope and described the behavior of moving objects in the sky
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