Uranus's moon Miranda has a cliff about 20 km high. In its weak gravity, a falling rock would take minutes to reach the bottom.
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In 1990, Voyager 1 looked back from 6 billion km away. That tiny speck in the sunbeam is Earth โ every person who ever lived.
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Uranus is colder than Neptune โ even though Neptune is farther from the Sun. Two 2025 studies say Uranus only radiates ~12โ15% more heat than it absorbs.
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NASA crashed a spacecraft into an asteroid on purpose โ and it worked. ๐ฅ
ESA's Hera is headed there next to inspect the crater.
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Saturn's north pole has a six-sided jet stream wider than Earth โฌก
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In 1054, Chinese astronomers saw a "guest star" so bright it was visible in daylight. Today it's the Crab Nebula, with a neutron star spinning 30 times a second. ๐ฅ
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It actually snows on Mars โ๏ธ NASA's Phoenix lander watched snow fall from Martian clouds in 2008, but it vaporized before reaching the ground.
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Jupiter's moon Io has over 400 active volcanoes ๐ Would you land there?
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Space has its own Halloween monsters ๐ A jack-o'-lantern Sun, a Witch Head and a Ghost Head. Which is spookiest?
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There's ice on the planet closest to the Sun. ๐งโ๏ธ Mercury's day side hits 430ยฐC, yet its polar craters stay below -170ยฐC.
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What if Earth had rings like Saturn? ๐ช Here's what our sky would look like.
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