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Science, Evolution, and Creationism, by the National Academies, focuses on teaching evolution in today's classrooms. Check out the other publications in our online store.
This is an image of Comet Shoemaker-Levy 9, broken into many pieces.
Click on image for full size
NASA/NSSDC and the Space Telescope Science Institute

The Discovery of Comet Shoemaker-Levy 9

Astronomer Gene Shoemaker has a partnership with his wife, Carolyn, and another astronomer named David Levy. Comet Shoemaker-Levy 9 was the ninth comet found by this partnership.

The Shoemakers work in a separate observatory from that of David Levy. When the Shoemakers think they have found a possible comet, they phone their partner so that he can also make an observation to be sure.

Comet Shoemaker-Levy 9 was discovered on the morning of March xx, 1993, and seemed to be a large, very strange, "squished" object. Later pictures showed it to be a string of small objects (a "string of pearls").

The Shoemakers traced the orbits backwards in time and realized that it had passed very close by Jupiter and could have been torn apart by Jupiter's gravity. Moreover, they realized that on its next pass by Jupiter it was going to plunge directly in.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA