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18 Cards in this Set
- Front
- Back
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GEOCENTRIC
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Ptolomey's theory that all the planets revolve around Earth
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HELIOCENTRIC
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earth and the other planets revolve around the sun
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heliocentric
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theory that all the planets revolve around the sun
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ellipse
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elongated circle or oval shape that all the planets orbit in
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inertia
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tendency for a moving object to continue in a straight line or a stationary object to remain still
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photosphere
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inner layer of the sun that makes light
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chromosphere
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middle layer where a red glow can be seen during a total eclipse
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corona
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outer layer only visible during eclipses
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solar wind
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a stream of electrically charged particles
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sunspots
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areas of gas on the sun that are cooler than the areas around them
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prominences
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reddish loops of gas that link sunspot regions
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solar flares
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explosions of hydrogen gas
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comet
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chunks of ice and dust whose orbits are usually very long narrow ellipses
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asteroids
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an object that revolves around the sun but is to small to be considered a planet
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meteoroid
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A chunk of ice or rock in space
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meteor
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a meteorioid that has entered earth's atmosphere
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meteorites
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meteorites that hit earths surface
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extraterrestrial life
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life other than that on earth
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