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____ was the first planet discovered using a telescope (1781).
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1. Mercury
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____ is one astronomical unit (93 million miles) from the Sun.
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2. Venus
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____ has a spectacular ring system containing some of its moons.
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3. Earth
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____ (the largest planet) and Saturn are gas giants.
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4. Mars
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The moons Ganymede and Titan are larger than the planet ____.
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5. Jupiter
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Uranus and ____ appear blue due to methane in their atmospheres.
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6. Saturn
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Due to iron oxide (rust) on its surface, ____ appears red.
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7. Uranus
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The Sun rises in the West on ____, due to retrograde rotation.
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8. Neptune
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