Advent calendar December 15: Bright Comet

In the winter of 2007, comet McNaught came into the local solar system. The comet made a close pass around the sun and left a huge tail behind it. The tail was easily visible in daylight if you knew where to look (too hazy at the time here in Seattle). The comet saved it's best show for when it passed to the Southern skies and down in Australia they got views like this.

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