The winds on Neptune break the sound barrier.
They scream at 1,200 mph — the fastest winds anywhere in the solar system.
Source
This fact is written from the English Wikipedia article it links to, so you can check every word in one tap. Fact Drop rates that source 4 out of 5 for credibility, and the rating travels with the fact on the back of its card in the app.
Why it sounds fake
What most people think
Jupiter is the stormy planet, and a far, cold world like Neptune should be still.
What is actually true
The farthest planet has the fastest winds in the solar system, past the speed of sound.
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