Space
Two moons
Mars’s moons are named for fear and panic.
Mars has two small moons, Phobos and Deimos, whose names are associated with fear and panic. Their mythological names suit a planet named for the Roman god of war.
Mars’s moons are named for fear and panic.
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Space
243 days
A rotation on Venus takes longer than its entire year.
Venus takes about 243 Earth days to rotate relative to the stars, longer than its 225-day year. Its solar day, measured from one sunrise to the next, is shorter: about 117 Earth days.
Space
1B tons
A teaspoon of neutron star would weigh about a billion tons.
A teaspoon-sized volume at neutron-star densities can have a mass of roughly a billion tons. This is a density comparison, not a suggestion that stable spoonfuls could be brought to Earth.
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