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🌀 Why Jupiter's Great Red Spot Is Shrinking

Track the Great Red Spot from a planet-sized storm to a shrinking, still-mysterious vortex—and see why scientists are testing the role of Jupiter's jet streams.

4
lessons
~20 min
to learn
Adults
level
Start the course →

What you’ll learn

  1. A storm that used to be largerDescribe what scientists mean when they say the Great Red Spot is shrinking.Long-term observations show a real change in the storm's horizontal size, not a planet getting smaller.
  2. How a storm gets measuredExplain how spacecraft images, cloud tracking, and repeated observations reveal the Spot's changing shape.Scientists compare boundaries, winds, depth, and oscillations across many years and instruments.
  3. Why the vortex may be losing widthConnect the Spot's shrinking width to Jupiter's surrounding jet streams and turbulent weather.The storm is a deep, rotating vortex whose edges exchange energy with nearby flows; models point to squeezing and altered feeding.
  4. A smaller storm is still a giant questionDistinguish established observations from hypotheses about the Spot's future.The Great Red Spot remains enormous and long-lived, while its exact origin, energy supply, and end state are still open questions.

Questions this course answers

What does “shrinking” describe in the Great Red Spot?

Long-term observations show the storm's visible oval has contracted, especially east-west.

Why do scientists compare many images instead of relying on one?

Repeated measurements make a long-term trend more reliable than a single before-and-after impression.

What does cloud tracking measure?

Researchers follow cloud features to estimate winds and jet-stream behavior.

What did Juno's gravity measurements help reveal?

Gravity data show that the moving storm is a deep atmospheric structure.

Why can a storm narrow without simply becoming weak?

Studies found size and peak winds need not change together.

What is the best current description of the cause of shrinkage?

The observations are strong, but researchers are still testing how several atmospheric processes combine.

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