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15 Cards in this Set
- Front
- Back
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What is an ellipse?
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The shape of a planet's orbit.
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Which of the 9 original planets is now considered a dwarf planet?
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Pluto
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What is one of the two "centers" of an ellipse called?
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a focus
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Who was the astronomer that discovered much about hte motion and orbit of the planets?
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Johannes Kepler
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What do we call three or more planets close together?
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massing
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What is the number that describes how round (or not round) an ellipse is?
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eccentricity
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What is an ellipse?
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the shape of a planet's orbit
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Which of the original 9 planets is now considered a dwarf planet?
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Pluto
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What is the distant from the earth to the sun (93 million miles) called?
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astronomical unit (au)
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What are the rocky bodies orbiting the sun between Mars and Jupiter?
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asteroids
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What are objects that burn up in the earth's atmosphere (shooting stars) called?
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meteors
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What is an icy object with a long tail traveling through the solar system called?
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comet
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How long does it take for one complete trip around the sun?
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a year
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What is the correct order of the planets?
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Mercury, Venus, Earth, Mars, Jupiter Saturn Uranus, Neptune
MVEMJSUN (My Very Excited Mother Just Made Us Nachos) |
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Why did the ancient Greeks name planets "wanderers"?
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the planets seemed to wander (move) when compared to the stars
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