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30 Cards in this Set
- Front
- Back
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revolve
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move around another object
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rotate
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spin on an imaginary line
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axis
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the imaginary line that goes through the center of the earth
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synodic rotation
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the amount of time that the earth appears to rotate in
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sidereal rotation
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the actual amount of time it takes for the earth to rotate in
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geocentric
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solar system where the earth is the center point of everything
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heliocentric
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solar system where the sun is the center point of everything
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Aristotle/Ptolemy
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ancient greek philosophers who created the idea about the geocentric solar system
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Copernicus
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first to propose the idea of the heliocentric solar system
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Galileo
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philosopher who was able to provide enough info to convince people that the heliocentric solar system was real
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Brahe
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carefully tracked the position of the moon planets and stars
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Kepler
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using Brahe's notes made very important discoveries about the orbits of the planets
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ellipse
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the shape in which the planets travel on (oval shape)
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perihelion
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point when we are closest to the sun
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aphelion
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point when we are furthest away from the sun
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horizon
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the point in the distance where the sky and the ground touch
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zenith
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the point directly over head
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altitude
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how high the sun is in the sky
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Newton
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discovered the force of gravity
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tropical zone
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warm weather all year round
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temperate zone
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warm summers and cold winters
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polar zone
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cold all year round
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waxing moon
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growing moon
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waning moon
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fading moon (getting smaller)
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umbra
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the central dark shadow of the moon when its in an eclipse
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penumbra
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partially dark shadow of the moon when its in an eclipse
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solar eclipse
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when the moons shadow falls upon the earth
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lunar eclipse
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when the earths shadow falls upon the moon
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spring tide
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occurs at quarter moons and causes less extreme tides
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spring tide
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occurs at full and new moons and causes more extreme tides
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