The Truth About Comet Ison (video)
Sky and Telescope - 9/24/13
Published on Sep 16, 2013
The most recent observations indicate Comet ISON is on track to hopefully (but not definitely) reach naked-eye visibility in December 2013's pre-dawn sky. S&T Senior Editor Alan MacRobert explains just why it's so tricky to predict how bright ISON will be, and previews what you'll need to know to spot it as it approaches the Sun for its close encounter.
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Standard YouTube License