A diagram showing the elliptical orbits of the inner, terrestrial planets, Icarus (an asteroid), and Halley's comet.
Windows Original.

A diagram showing the elliptical orbits of the inner, terrestrial planets, Icarus (an asteroid), and Halley's comet.
Windows Original.

A diagram showing the elliptical orbits of the inner, terrestrial planets, Icarus (an asteroid), and Halley's comet.
Windows Original.

The source of this material is Windows to the Universe, at http://www.windows.ucar.edu/ at the University Corporation for Atmospheric Research (UCAR). ©1995-1999, 2000 The Regents of the University of Michigan; ©2000-05 University Corporation for Atmospheric Research. All Rights Reserved. Site policies and disclaimer