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____ appears vivid bright blue. Triton is its largest moon.
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1. Mercury
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____ is the smallest planet and the closest to the Sun.
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2. Venus
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____ was the first planet discovered using a telescope (1781).
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3. Earth
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____ has an atmosphere of 78% nitrogen and 21% oxygen.
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4. Mars
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____ has spectacular rings. Titan is its largest moon.
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5. Jupiter
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____ appears red due to the iron oxide dust on its surface.
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6. Saturn
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____ has a very dense, mostly carbon dioxide atmosphere.
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7. Uranus
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____ is the largest planet. Ganymede is its largest moon.
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8. Neptune
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