Astronomy Picture of the Day
    

Keyword: Comet Swan
Призрачный хвост кометы Сван The Ghostly Tail of Comet SWAN
6.11.2006

What causes the structure in Comet SWAN's tail? Comet SWAN, which unexpectedly flared up to naked-eye brightness last week, has been showing detail in its ion tail that might be described as ghostly.





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