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____ is one astronomical unit (93 million miles) from the Sun.
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1. Mercury
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____ has a huge dormant volcano named Olympus Mons.
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2. Venus
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The Great Red Spot on ____ is a massive persistent windstorm.
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3. Earth
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Uranus and ____ appear blue due to methane in their atmospheres.
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4. Mars
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____ has the shortest orbit. A year is just 88 Earth days.
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5. Jupiter
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____ has 27 known moons and, like Neptune, a faint ring system.
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6. Saturn
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____ has a spectacular ring system containing some of its moons.
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7. Uranus
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Mercury and ____ are the only planets with no moons.
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8. Neptune
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