Hubble has identified the true visible-light color of a giant Jupiter-sized
planet located 63 light-years away. The planet has a cobalt blue color. It
has torrential 4,500-mile-per-hour winds that are so hot they melt
silicates into raindrops of molten glass. And that’s where the cobalt-blue
hue comes from, not oceans. The glass droplets scatter blue light more
readily than green or red light.
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