This portal provides links to the homepages of twenty-seven NASA missions whose objectives involve Sun-Earth studies. Research topics include the nature of interactions between the solar wind and Earth's atmosphere, the nature of electrodynamic activities in Earth's ionosphere and magnetosphere, and the properties of Earth's geotail and magnetotail. Where available, links to education and outreach ... Full description.

This document provides the user with an introduction to the structure and physical properties of the Sun. A brief discussion of hydrogen fusion is included, along with a table that lists some numerical information about our star. Links to a glossary are embedded in the text, and links to related sites are also provided. Full description.

This movie shows a total eclipse of the Sun which occurred in 1994. It is accompanied by a link to a written description of the Sun's physical characteristics. Full description.

This movie was assembled from images captured by the Solar Heliospheric Observatory (SOHO). It depicts a doomed comet curving in towards the sun and not reappearing, apparently having evaporated in the sun's atmosphere. Full description.

This animation depicts the formation of the solar system from a solar nebula, a great swirling cloud of gas and dust. It is accompanied by a link to a written description explaining the solar system's formation in greater detail. Full description.

This collection of images, movies, and animations from NASA's Solar and Heliospheric Observatory (SOHO) features a large selection of images of the sun and of solar phenomena. Although most of the imagery is of the sun, a few images of comets and planets as they transit the solar disk are available. Full description.

Users can access a variety of information about the The SOHO Extreme Ultraviolet Imaging Telescope, as well as maps, imagery, and data. A description of the instrument is provided, along with temperature maps, movies and images of eclipses, solar storms, and coronal mass ejections. Links to related sites are also included. Full description.

Users can access a variety of information on the SOHO satellite and instrument. The scientific purpose of the mission, a study of the extended solar corona, is discussed, and links to mission logs, news articles, observations, and meetings are provided. Links to a tutorial, data, and software are also included. Full description.

Visitors to this site can examine and download materials that provide information and activities about the Chandra mission. These materials include a coloring and activity book, a tutorial and trading cards about Chandra, information on galaxies and the X-ray universe, and paper models of Chandra and other observatory satellites. Full description.

Teachers may choose from a number of lesson plans for grades 6-12 that use mathematics in the study of various science topics. Most lesson plans include standards, introductory materials or activities, materials lists, instructions, and assessment criteria. Links to additional materials are provided. Full description.