This photo gallery features an extensive selection of imagery of many types of objects in space. The gallery is divided by type of object: solar system (planets, asteroids, comets, etc.), astronomical objects (nebulae, galaxies. etc.), and other images (sun, spacecraft). Detailed captions are provided for some images. Indices are provided for imagery from three major sources: Galileo, the Hubble Space ... Full description.

This activity will help students understand how white light is broken up into its component colors by a diffraction grating and what the relationships are between the wavelength, frequency, and energy of light. Objectives, applicable standards, and pre-requisite materials are described, and instructions and a materials list are provided. Full description.

This activity will allow the student to look at real-time satellite, radar, and derived imagery to study the growth and development of thunderstorms. Full description.

This site provides background information about the relationship between ocean currents and surface winds. There are links to images, JPL missions and instruments, and an El Nino site. Full description.

This site provides a description and graphic representation of the Coriolis Force, with links to a video and related sites. Full description.

This alphabetical list of links explains a variety of scientific phenomena. Clicking on the name of a particular phenomenon will provide the user with a written definition or description and a list of links to exhibits (another part of the site) which illustrate it. Full description.

This is an introduction to the concept of seafloor spreading proposed by Harry Hess in the early 1960's. This site offers multiple links to further examine this geologic hypothesis. Full description.

Visitors to this site can choose from a set of links to materials on basic astrophysics, cosmic radiation, features and behavior of the sun, and space weather. An "Ask Us" feature, a glossary, and a selection of links to related sites are included. Full description.

This article explains the life cycles of stars. Topics include the effect of a star's mass on its life cycle, and what happens when stars reach the end of their life spans. Links to a glossary are embedded in the text. Full description.

This is a group of frequently asked questions and answers about Earth's magnetic field and poles, the magnetic compass, magnetic reversals, and geomagnetic models. Links to maps and illustrations are embedded in the text. Full description.