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Become a nitrogen atom in the nitrogen cycle in our Traveling Nitrogen Classroom Activity Kit/Game. See all our games, activity kits and classroom activities.

Pick a Postcard - Comets


This is an image of Comet Kohoutek.
Courtesy of NASA

This is a full view of Comet Hyakatuke.
Courtesy of Hal Weaver (Applied Research Corp.), HST Comet Hyakutake Observing Team and NASA

This is an image of Comet P/Halley taken with the Halley Multicolor Camera on the ESA mission Giotto.
Courtesy of NASA/NSSDC

This is an illustration of Comet P/Shoemaker-Levy 9 and Jupiter.
Courtesy of H.A. Weaver, T.E. Smith (Space Telescope Science Institute) and J.T. Trauger, R.W. Evans (Jet Propulsion Laboratory), and NASA

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF