Compared to the Webb image from earlier this year, some details of the cap are easier to see in these newer images. One of the most striking of these is the planet’s seasonal north polar cloud cap. In infrared wavelengths, Webb is revealing a strange and dynamic ice world filled with exciting atmospheric features. In visible wavelengths as seen by Voyager 2 in the 1980s, Uranus appeared as a placid, solid blue ball. It also imaged many of the planet’s 27 known moons, even seeing some small moons within the rings. With its exquisite sensitivity, Webb captured Uranus’ dim inner and outer rings, including the elusive Zeta ring – the extremely faint and diffuse ring closest to the planet. The image expands upon a two-color version released earlier this year, adding additional wavelength coverage for a more detailed look. Webb captured this dynamic world with rings, moons, storms, and other atmospheric features – including a seasonal polar cap. NASA’s James Webb Space Telescope recently trained its sights on unusual and enigmatic Uranus, an ice giant that spins on its side.
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