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Astronomy: Solar System Planets

About 71% of ____ is covered by water. 1. Mercury
Due to its low density, ____ could theoretically float on water. 2. Venus
The presence of ____ was mathematically predicted in 1846. 3. Earth
Due to iron oxide (rust) on its surface, ____ appears red. 4. Mars
____ has a Great Red Spot, which is a massive persistent storm. 5. Jupiter
____ has 27 known moons and, like Neptune, a faint ring system. 6. Saturn
The moons Ganymede and Titan are larger than the planet ____. 7. Uranus
Due to its thick CO2 atmosphere, ____ is the hottest planet. 8. Neptune