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The Day the Earth Smiled

In this rare image taken on July 19, 2013, the wide-angle camera on NASA’s Cassini spacecraft has captured Saturn’s rings and our planet Earth and its moon in the same frame. The dark side of Saturn, its bright limb, and its rings are clearly seen. Earth, which is 1.44 billion kilometers away in this image, appears as a blue dot at center right; the moon can be seen as a fainter protrusion off its right side. »