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Arches National Park Geology Tour provides an extensive, visually rich description of the geology of Arches, by Deborah Ragland, Ph.D. See our DVD collection.

Nicole-Reine Lepaute

Nicole-Reine Etable de la Briere Hortense Lepaute was a French astronomer who lived between 1723-1788. In 1762, she calculated the exact time of a solar eclipse that was to occur in 1764. She wrote an article about this that gave a map of the eclipse's extent in 15-minute intervals across Europe.

Lepaute also made predictions for the return of Halley's Comet in 1759. She figured out how gravity from the planets would affect the comet's path.

Her husband, Jean Andre Lepaute was France's royal clockmaker.


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Our online store includes fun classroom activities for you and your students. Issues of NESTA's quarterly journal, The Earth Scientist are also full of classroom activities on different topics in Earth and space science!

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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