A bolt of lightning is about five times hotter than the surface of the Sun.

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Lightning during an overnight storm at the port and lighthouse in Port-la-Nouvelle in the Aude department in southern France.
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5x

A bolt of lightning is about five times hotter than the surface of the Sun.

Lightning can briefly heat its channel of air to several times the temperature of the Sun’s visible surface. The comparison is not with the much hotter solar core, and five times is only an approximate shorthand.

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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.

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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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