Close Comet and the Milky Way . ... Explanation: Comet 252P/Linear's lovely greenish coma is easy to spot in this expansive southern skyscape. Visible to the naked eye from the dark site near Flinders , Victoria, Australia, the comet appears tailless. Still, its surprisingly bright coma spans about 1 degree, posed here below the nebulae, stars, and dark rifts of the Milky Way. ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...