This portal provides an extensive set of links to information on solar and lunar eclipses, planetary transits, solar system data, moon phases, and related resources. Information on recent and upcoming eclipses and other celestial events is also included. Full description.

This is the National Oceanic and Atmospheric Administration's hurricane website. Features include weather watches, warnings, and forecasts. Also included are links to other NOAA sites, preparedness guides, imagery, and information on the Saffir-Simpson scale. Full description.

Users can access news articles, background information and links about the International Space Station. Materials presented here include crew biographies, expedition press kits, accounts of science experiments, and imagery taken from the station. Other features include a clock/counter that logs the station's and the crew's time in orbit and information for ground-based observers who wish to view the ... Full description.

Located in Camp Springs, Maryland, the Volcanic Ash Advisory Center (VAAC) produces volcanic ash advisories and ash forecast and transport models. Real-time ash adivisories, volcano graphics and imagery, and links to related topics are available at the website. Full description.

Kids can explore environmental science topics using satellite imagery and NASA data. Materials presented here explain how people affect the Earth and how NASA studies land, water, the atmosphere, and natural hazards from space. Factoids which change every few minutes are presented, and kids can send postcards featuring NASA images to their friends. Full description.

This is the homepage of the U.S. Global Research Program (USGCRP), an initiative to support research on the interactions of natural and human-induced changes in the global environment and their implications for society. Visitors can study overviews of the topics of greatest interest to the USGCRP, which include atmospheric composition, climatic variability and change, global cycles for carbon and ... Full description.

This site provides statistics and information on the worldwide supply of, demand for, and flow of minerals and materials essential to the U.S. economy and to national security. The database is searchable by commodity, country, state, or keyword. Links to a variety of related topics and publications are included. Full description.