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Home Black skies at high noon, photographed from a high-altitude helium balloon on September 3rd, 2011. (Credit: Earth to Sky, a student group located in Bishop, CA.) Black skies at high noon, photographed from a high-altitude helium balloon on September 3rd, 2011. (Credit: Earth to Sky, a student group located in Bishop, CA.)

Black skies at high noon, photographed from a high-altitude helium balloon on September 3rd, 2011. (Credit: Earth to Sky, a student group located in Bishop, CA.)

Black skies at high noon, photographed from a high-altitude helium balloon on September 3rd, 2011. (Credit: Earth to Sky, a student group located in Bishop, CA.)

Black skies at high noon, photographed from a high-altitude helium balloon on September 3rd, 2011. (Credit: Earth to Sky, a student group located in Bishop, CA.)

Comet 21P/Giacobini-Zinner in November 1998. (Photographed by astronomers at Kitt Peak)