4,994
edits
Changes
Jump to navigation
Jump to search
Line 4:
Line 4: + + + +
Copying images used in the Halley's Comet article
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]].
[[Image:Halley1910a.jpg|right|thumb|300px|Halley's Comet on its 1910 appearance. This Yerkes Observatory photograph is highly enlarged; the comet would not have appeared this large or bright to the naked eye.]]
[[Image:Yerkeshalley2.jpg|right|thumb|300px|Illustration of how Halley's Comet might have looked to a naked-eye observer standing on the ground of Yerkes observatory. Moon at left, Halley's at right. Relative sizes are correct and this is the way an extremely bright comet actually looks. Although its appearance suggests motion, comets do not swoop through the sky; their position changes slowly over many hours.]]
==See also==
==See also==