Mars had an oxygen-rich atmosphere around 4 billion years ago
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The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
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Jupiter is bigger than all the other planets combined.
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Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
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It 'snows' metal on Venus.
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Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
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When a massive power outage struck southern California in the 1990s, Los Angeles residents reportedly called 911 to express alarm about strange clouds hovering overhead; they were seeing the Milky Way for the first time.
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