This brochure provides details about NASA?s GRACE mission. Gravity controls everything from the motion of the ocean tides to the expansion of the entire Universe. To learn more about the mysteries of gravity, the twin Gravity Recovery and Climate Experiment (GRACE) satellites, are taking detailed measurements of Earth's gravity field. This experiment could lead to discoveries about gravity and Earth's ... Full description.

This brochure describes the Moderate Resolution Imaging Spectrometer (MODIS) instrument on NASA's Terra satellite. The first NASA Earth Observing System (EOS) satellite, Terra, was launched on December 18, 1999, carrying five remote sensors. The most comprehensive EOS sensor is MODIS which offers a unique combination of features: it detects a wide spectral range of electromagnetic energy; it takes ... Full description.

This brochure describes NASA's ICESat mission ((Ice, Cloud, and land Elevation Satellite), which was launched January 12, 2003. ICESat is the benchmark Earth Observing System mission for measuring ice sheet mass balance, cloud and aerosol heights, as well as land topography and vegetation characteristics. Full description.

This bookmark provides basic information about the importance of ground truth measurements for investigative science and the formation of clouds. It also provides information about an opportunity for students to participate in a real-time collaborative scientific experiment with NASA scientists: the Student Cloud Observations On Line (S'COOL) project. S?COOL is a component of NASA's Clouds and the ... Full description.

This lithograph shows images from NASA?s Landsat 7 Enhanced Thematic Mapper Plus instrument of the Boulder, Virgin, and Gregg basins that comprise the southern portion of Lake Meade. About 96% of the water in Lake Mead is from melted snow that falls in Colorado, Utah, New Mexico, and Wyoming. During the period from May 2000 to April 2003 severe drought occurred in the western states, and Colorado ... Full description.

This lithograph shows the break-off of a large iceberg from the Pine Island Glacier in West Antarctica. This event occurred between November 4th and 12th, 2001, and provides powerful evidence of rapid changes underway in this area of Antarctica. The three images presented were acquired by the vertical-viewing (nadir) camera of the Multi-angle Imaging SpectroRadiometer (MISR) instrument aboard NASA's ... Full description.

This color brochure answers common questions about the aurora, including its cause and explanations of its colors, shapes, and location. It lists resources for further study. Full description.

This booklet describes the interstellar medium and the local bubble that is being studied by NASA?s Cosmic Hot Interstellar Plasma Spectrometer (CHIPS) satellite. It contains review questions and problems for students, plus two activities to help to understand some of the concepts discussed. Full description.

This brochure informs the public about the GLAST mission. It describes in detail the science that the Gamma-ray Large Area Space Telescope (GLAST) will do and how it will do it. The description includes the GLAST instruments, background information on gamma ray astronomy and detection methods. It also describes current thinking about active galaxies, gamma-ray bursts, solar flares, gamma-rays from ... Full description.

This booklet allows students to learn how astronomers get information about the Sun and other stars. Full description.