Winds on Neptune tear along faster than the speed of sound in our own air, at the outer edge.

What it means

Measured wind speeds there run past two thousand kilometers an hour, which is puzzling because Neptune receives so little sunlight to drive its weather. Something internal must be supplying the energy. The planet radiates more heat than it absorbs from the sun, and that leftover warmth from its formation is the leading candidate for what keeps the atmosphere moving.

The claim comes from NASA, and the page it comes from was read on 2026-08-27 to confirm it still says this.

This one can change, so it is due to be checked again by 2028-01-01.

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This fact is a cryptogram here: 73 letters over 16 different ones, graded easy.

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Nearby in the collection

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• NASAeasy, 72 letters
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• NASAmedium, 79 letters
• NASAhard, 76 letters

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• NASAeasy, 69 letters
• NASAeasy, 71 letters
• NASAmedium, 71 letters
• NASAmedium, 71 letters