Geomorphology from Space is an out-of-print 1986 NASA publication designed for use by the remote sensing, science, and educational communities to study landforms and landscapes. Users can access a gallery of images consisting of 237 plates arranged by particular types of landforms such as tectonic, volcanic, planetary, and others. Photographs, locator maps, and sometimes a geologic map accompany the ... Full description.

This archive of climatic data houses both national and global datasets as part of the National Climatic Data Center's (NCDC) mission to describe the climate of the United States and to maintain records regarding trends and anomalies of weather and climate. Users may search the archive by data type, national or global coverage, and time period; or by resource type, such as satellite, radar, models, ... Full description.

Watersheds are those land areas that catch rain or snow and drain to specific marshes, streams, rivers, lakes, or to ground water. This site allows users to locate their watershed by city, county, state, or region. Links provide information about stream flow, water use, conservation efforts, demographics, forest riparian habitats, science in your watershed, water discharges, and assessment of watershed ... Full description.

This learning system provides a variety of materials on Earth and space sciences, such as images, movies, animations, and data sets. Students, teachers, and the general public can access information on the sun and space weather, astronomy, our planet and solar system, current space missions, space-related mythology and art, and geology. For teachers, there are links to tools for navigating the site, ... Full description.

This educational brief provides an overview of how previously unrevealed information about our galaxy and other celestial objects can be obtained by examining their energy emissions in parts of the electromagnetic spectrum other than that visible to the human eye. Remote imagery of the Milky way in several wavelengths is included, and links to additional information are embedded in the text. Full description.

This educational brief presents a discussion of how the Landsat project has been able to provide data on environmental changes and potential problems. Topics include a short history of the project, an overview of the sorts of environmental issues Landsat satellites are able to "see" from space, and a brief description of ground truthing and how it supports remotely sensed data. Full description.

This tutorial explains the Keplerian elements, the seven numbers which are required to define the orbit of a satellite. Each section addresses one of the elements, giving a literal definition as well as a practical explanation in simple language with some examples of typical numeric values. Full description.

The home page of the Astrophysics Science Division at Goddard Space Flight Center provides information on the division's research projects, missions, goals, and activities. Topics include the evolution of galaxies, stars, and planets; the diversity of worlds outside our solar system; the possibillity of life on those worlds; and astrophysics questions such as what powered the Big Bang, what is dark ... Full description.

This site discusses the cosmic microwave background, radiation left over from the Big Bang. Particular emphasis is upon tiny fluctuations in the temperature of the radiation, which are believed to reflect fluctuations in the density of matter in the early universe. Full description.

This is an infrared (IR) GOES satellite image of the United States, taken in December 2004. Full description.