Lunar and Planetary Institute


Welcome to Explore! Comets

Comets are “dirty snowballs”—clumps of ice, gas, dust, and a small amount of organic material—that orbit our Sun.  There are about 1000 known comets and more are discovered each year.  In the Make a Comet activity, children construct their own models of a comet using a variety of art supplies.  Dry ice and other items are used to construct a demonstration model of a comet that illustrates the comet nucleus, coma, and tails in Dry Ice Comet.  The activities are suitable for children ages 8-13 unless otherwise noted in the “activities” section.  Discover links to additional games, activities, and information in the “further resources” section.

Last updated
May 27, 2009