At the heart of this celestial mystery lie Earth-sized ovals visible only in ultraviolet (UV) light. These dark spots, embedded in stratospheric haze layers, appear and vanish seemingly at random.
Dark ovals in Jupiter's polar haze, visible only at UV wavelengths, were first noticed 25 years ago, then ignored. A new study shows that these dark UV ovals are common, appearing at the south pole in ...
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