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Blue Giant

Featured on September 3, 2017

Giant Neptune is the bluest planet in the solar system, as shown in this 1989 view from the Voyager 2 spacecraft. Methane in the upper atmosphere, along with unknown chemical compounds, absorb red light, making the planet look blue. [NASA/JPL]

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Find out more in our radio program entitled

Neptune at Opposition

Voyager 2 view of the southern hemisphere of Neptune

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Two stars trying to get in sync

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Blue Giant

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