As planetary rings go, Neptune’s are especially dim—we couldn’t even confirm they existed until Voyager 2 got a close look at the planet in 1989. Since then, Neptune’s rings have been imaged by JWST ...

Neptune’s clouds have disappeared. Since the first detailed images of the planet were taken by the Voyager 2 spacecraft in 1989, its cerulean disc has been criss-crossed by wispy white clouds, but its ...

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