How do Neptune's winds get so fast?
Quick Answer
Neptune’s winds are powered by internal heat and atmospheric dynamics, reaching speeds over 2,000 kilometers per hour in the strongest jets.
The Full Story
Neptune is far from the Sun, so sunlight alone cannot explain the energy in its atmosphere. The planet gives off more heat than it receives, and that internal energy helps drive strong winds and storms. Voyager 2 observed a famous dark spot and fast-moving cloud bands during its 1989 flyby, revealing winds that can exceed 2,000 kilometers per hour. Neptune’s blue appearance comes from methane in its atmosphere absorbing red light. Even at the edge of the Solar System, the planet’s weather is surprisingly active.
Key Facts
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