Space
1 face
We always see the same side of the Moon from Earth.
Yes. The Moon is tidally locked, meaning it rotates once on its axis in the same time it takes to orbit Earth, about 27.3 days. So the same hemisphere always faces us.
We always see the same side of the Moon from Earth.
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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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