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See also: Halley's Comet
Comet [[orbit]]s around the sun may be highly [[elliptical]], rather than nearly circular (such as planets), which takes them out past the orbit of [[Pluto]]. Some of the mass of the comet will [[sublimate]] with each pass by the sun and after many passes the comet may no longer be active and be simply an [[asteroid]].
Comet [[orbit]]s around the sun may be highly [[elliptical]], rather than nearly circular (such as planets), which takes them out past the orbit of [[Pluto]]. Some of the mass of the comet will [[sublimate]] with each pass by the sun and after many passes the comet may no longer be active and be simply an [[asteroid]].
==See also==
*[[Halley's Comet]]
[[category:astronomy]]
[[category:astronomy]]