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17 Cards in this Set
- Front
- Back
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solar system
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the system of nine planets and many smaller objects that orbit the Sun
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Mercury
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second smallest planet and closest to the Sun
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Venus
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the second planet from the sun which is smaller in size and mass to Earth
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Earth
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the third planet from the Sun
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astronomical unit
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the average distance from Earth to the Sun (150 million km)
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Mars
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the fourth planet from the Sun known as the red planet
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Jupiter
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the fifth planet from the Sun and the largest
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Great Red Spot
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A giant, high pressure gas storm on Jupiter
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Saturn
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the second largest planet and the sixth planet from the Sun
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Urnaus
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the seventh planet from the Sun
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Neptune
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usually the eight planet from the Sun
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Pluto
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considered to be the ninth and smallet planet
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comet
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a mass of frozen gasses, dust, and rock particles that oftendevelops a bright tail when it passes near the sun and is acted on by solar winds
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Oort cloud
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a cloud of comets surrounding the solar system beyond Pluto's orbit
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meteor
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a meteroid that enters Earth's atmosphere and burns up as it falls
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meteorite
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a meteor that does not completely burn up in Earth's atmosphere and strikes Earth
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asteroid
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a piece of rock similar to the material that formed into the plantes
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