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There is an enormous hexagonal storm on the north pole of Saturn which is large enough to drop the Earth into. Ferrebeekeeper has long been fascinated by this giant yet geometrically-regular storm, and that was before we learned that the hexastorm…changes color!

Like Earth, Saturn is tilted, and, as with Earth, the tilt affects how much sunlight reaches different hemispheres of the planet as it proceeds around the sun. Since Saturn is rather farther from the sun than the Earth is, a Saturn “year” lasts for 29 Earth years. Due to this somewhat lengthened calendar (and because we have only recently acquired some of the necessary tools to study other planets) the seasonal variances on Saturn are only now being recognized.

Using the Hubble Space telescope, scientists have been keeping an eye on Saturn’s seasons (each of which last for 7.25 years). As summer in the northern hemisphere changes to fall, the color of the atmosphere is changing and so are the appearances of the bands within the atmosphere. NASA scientists speculate that increased sunlight may lead to increased photochemical hazes in the atmosphere which causes the shift from winter blue to summer gold. As we continue to study Saturn in years to come, it will be interesting to see how much of this color shift is seasonal and how much it changes based on larger cycles.

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