Comparing Europa to Earth's size and oceans, this resource tells the story of the Galileo spacecraft's exploration of Europa in the late 1990's, and explains why scientists believe there may be an ocean of water underneath Europa's icy crust. Full description.

This 2-page color fact sheet briefly describes NASA?s Kepler mission, its instruments, and ground system. Also included are tables listing the instrument parameters and the major institutions involved. Kepler is a spaceborne telescope specifically designed to survey our region of the Milky Way galaxy to detect and characterize hundreds of Earth-size and smaller planets in or near the habitable zone. ... Full description.

This storybook for children tells the story of the Sun, its relationship to Earth and to stars. The easy-to-understand text and graphics make it a useful classroom tool for younger students. Full description.

This lithograph includes an artist?s rendition and description of a chance observation of a gamma-ray burst made by the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI)spacecraft that has shed new light on the mysterious source of these immense explosions. Full description.

This resource offers a week of online curriculum with daily topics on the Sun, including Sun as a Star, the Sun Close Up, Solar Activity, Eclipses, and Careers organized for Solar Week 2011. Each day contains a game, an activity, topical questions, a related Life Science topic, teacher information, and an Ask the Scientist page. Full description.

This full disk view photograph of the Earth was taken by the crew of Apollo 17 just hours after liftoff in December 1972, when they found themselves aligned with Earth and the Sun. Apollo 17 was the final mission to the moon and the first human spaceflight launch made at night. Full description.

The Ocean World site has a wide variety of information regarding the ocean. Established by Texas A and M University's Jason Project, Ocean World provides a wealth of information on weather, forams, icebergs, fisheries, coral reefs, waves, El Nino, currents and more. The site contains information for both students and teachers. The teacher section of the site contains background information on all ... Full description.

This page is part of a larger USGS project called Water Science for Schools. This section covers different water-use topics and categories of water-use. A Spanish translation is available. Full description.

Wilson Alwyn Bentley (1865-1931), famous for his photomicrographs of snow crystals, prepared sets of glass lantern slides of dew, frost and ice crystals. Many of these sets found their way to colleges and universities around the United States. The University of Wisconsin's Department of Atmospheric and Oceanic Sciences donated their collection to the Schwerdtfeger Library in 2000. Shortly after, the ... Full description.

This site provides an overview of the earth's atmospheric greenhouse effect by briefly exploring the atmospheres of nearby planets and discussing the greenhouse gases of our atmosphere. Information at this site helps students to understand that the greenhouse effect is what makes this planet suitable for life as we know it and that the earth's atmosphere contains trace gases, water vapor, carbon dioxide, ... Full description.