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Why does Mars look red?
Confirmed
Its dust is rich in iron oxide, or rust
Iron in Martian rock and dust has reacted with oxygen over time, giving the surface and sky a rusty tint.
On Venus, which is longer: a day or a year?Saturn is mostly gas. Would it float in a big enough bathtub?Which planet was found by mathematical prediction before anyone saw it?Which planet in our solar system is the only one not named after a Greek or Roman god?About how far does the Moon drift away from Earth each year?What share of Earth's surface is covered by ocean?