Comets

• by Djulia

  A comet is an icy body that releases gas or dust. They are often compared to dirty snowballs, though recent research has led some scientists to call them snowy dirtballs. Comets contain dust, ice, carbon dioxide, ammonia, methane and more.

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  Posted July 16, 2016 1:36 PM

• by Budgieye moderator

  For more comets see

  8.4 comets http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=8&comment_id=53d8bc2b0d43f77bd6001042

  Posted July 16, 2016 9:11 PM