The ice giant’s atmosphere has been acting a little strange lately and astronomers are figuring out why.
every 11 years, the magnetic field flips, as it becomes more tangled like a bundle of string. During periods of more heightened activity on the sun, more intense ultraviolet radiation bombards our solar system.
The team used data from the Lick Observatory in California, the W.M. Keck Observatory in Hawaii, and NASA’s 30-year-old Hubble Space Telescope and. The planet’s reflectivity increased in 2002 and dimmed in 2007. Then, the ice giant brightened again in 2015 before it darkened to its lowest level ever seen in 2020. That’s when most of the cloud cover faded away.
“It’s fascinating to be able to use telescopes on Earth to study the climate of a world more than 2.5 billion miles away from us,” study co-author and Keck Observatory staff astronomer Carlos Alvarez
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