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<n>Pale Blue Dot Revisited</n>, reprocessed by <n>Kevin M. Gill</n> from <n>Voyager 1</n>'s 1990 photo of <n>Earth</n>.

<n>Tethys in the Fore</n>, a 2009 photo of <n>Saturn</n>'s moon by the <n>Cassini spacecraft</n>.

The <n>Eye of the Desert</n>, a geological formation in the central desert of Iran.

The <n>minimalist</n> die-cut cover for the 1980 book <n>Black Holes, Quasars, and the Universe</n>.

A mosaic of Saturn's moon <n>Enceladus</n> captured by the <n>Cassini spacecraft</n> in 2005.

<n>Étienne Léopold Trouvelot</n>'s illustration, <n>Étoiles multiples colorées</n>, 1881.

Saturn’s B ring peaks 

A view of peaks in <n>Saturn's B ring</n>, captured by the <n>Cassini spacecraft</n> in 2009. Photo by <n>NASA</n>/<n>JPL</n>.