PHM Planetarium &
Air/Space Museum
Please note this page is not regularly maintained. August 2006. New definition for planet ousts Pluto, leaving us with eight planets. A planet is a celestial object that orbits the sun, has sufficient mass for its self-gravity to overcome rigid-body forces so that it is nearly round, and has "cleared the neighborhood around its orbit." A separate category acknowledges dwarf planets. See news at http://skytonight.com/3728231.html.
http://analyzer.depaul.edu/paperplate/pveclipse2004.htm http://marsrovers.jpl.nasa.gov/home/index.html |
Copyright ©2003-2008 Chuck Bueter. All rights reserved. |