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Hyakutake Comet
Photo: Comet streaking through sky
WALLPAPER
No telescope was needed to see comet Hyakutake above the Palomar Observatory in San Diego County, California, as it came within 9.3 million miles (15 million kilometers) of Earth in 1996. Hale-Bopp, 13 times as far away at its closest, was twice
Photograph by Don Bartletti

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