Saturn's main rings are about 280,000 kilometers wide but often only about 10 meters thick.

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Saturn and its broad, thin rings seen by the Cassini spacecraft
Space

~10 m

Saturn's main rings are about 280,000 kilometers wide but often only about 10 meters thick.

Yes. Saturn's main rings stretch roughly 280,000 kilometers across, but their typical vertical thickness is only about 10 meters, reaching around a kilometer in places. They are made mostly of water ice.

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Venus from Mariner 10
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.

Moving heart of the Crab Nebula
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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