This collection of images shows geologic features in many of the country's national parks. The collection is searchable by park name, state, year, or by the name of the photograph. Each photo is accompanied by a brief caption that provides the photographer's name, the date, and a description of the photo. Full description.

This set of posters contains images of the Sun, the nine planets, Earth's moon, the moons of Jupiter, asteroids, and comets. Each poster features a brief description of the image, some statistical facts, and significant dates in the study of these objects. Full description.

This lithograph shows mosaic images of Mercury, captured by the Mariner 10 spacecraft. The images are accompanied by a brief description and history, some statistical facts, and a list of significant dates in the exploration of Mercury. Full description.

This collection of images features spacecraft and instruments used for high-energy research, typically studies of X-rays and Gamma rays. The collection includes pictures of early astronomy rockets and instruments, an archive of videos, and a large selection of images of vehicles and instruments from more recent missions. Some of the more recent missions also include lightcurve, spectral, and/or image ... Full description.

Visitors to this site can access news and information about the Sun-Earth environment. Materials presented here include current conditions for solar wind, X-rays, sunspots, and magnetic fields; forecasts for solar flares and geomagnetic storms; and information on near-earth asteroids. An image gallery and an extensive selection of links to related topics are also provided. Full description.

The aerial video and still photography assembled here allows users to see "before" and "after" imagery of the impacts of coastal storms. Oblique images are available for storms from Hurricane Ivan in 2004 to Hurricane Fran in 1996. Each set of images is accompanied by a brief description, and some LIDAR imagery is avaliable. Links to other related sites are also included. Full description.

Sand covers only about 20 percent of the Earth's deserts. Nearly 50 percent of desert surfaces are gravel plains where removal of fine-grained material by the wind has exposed loose gravel and occasional cobbles. This web page, produced by the U.S. Geological Survey, features text and photographs that describe desert landforms, soils, plants, and the role of water in the formation of desert landscapes. ... Full description.

Desertification, the degradation of formerly productive land into desert, is a complex process. It involves multiple causes, and it proceeds at varying rates in different climates. This web page, produced by the U.S. Geological Survey, features text and photographs that explain what desertification is, how human activities may contribute to it, how satellite imagery is used for monitoring vulnerable ... Full description.

Major volcanic eruptions alter the Earth's radiative balance, as volcanic ash and gas clouds absorb terrestrial radiation and scatter a significant amount of the incoming solar radiation, an effect known as "radiative forcing" that can last from two to three years following a volcanic eruption. This results in reduced temperatures in the troposphere, and changes in atmospheric circulation patterns. ... Full description.

This site consists of JPEG images of the planets, including photographs of Jupiter, Mars, Saturn, historic photographs, and artistic illustrations (montages). Links to other parts of the GRIN image library are provided. Full description.