Photos: Couldn't see Pan-STARRS? Try these 'comets'

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Comet sightings, Northwest style
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  • Comet sightings, Northwest style
  • Comet sightings, Northwest style
  • Comet sightings, Northwest style
  • Comet sightings, Northwest style
  • Comet sightings, Northwest style
  • Comet sightings, Northwest style
  • Comet sightings, Northwest style
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Comet sightings, Northwest style
A rare conjunction of celestial events -- a Mercury Comet. Decades ago, this Comet used to be spotted anywhere along the I-5 corridor, but now is seen with rarity on par with Halley's Comet. (Photo: Flickr user hisgett, CC 3.0 license)