Jet Propulsion Laboratory scientists use advanced technologies to track asteroids and comets that have the potential to one day come close to Earth.

This web page is designed to give everyone an idea of what our universe actually looks like. There are nine main maps on this web page, each one approximately ten times the scale of the previous one. The first map shows the nearest stars and then the other maps slowly expand out until we have reached the scale of the entire visible universe.

The International Space Station is a unique place – a convergence of science, technology and human innovation that demonstrates new technologies and makes research breakthroughs not possible on Earth.

Obviously, NASA's site is the one to visit for up-to-the minute space news and other resources. It is also the gateway to the rest of NASA's many associated pages, many of which are included in this collection. But this homepage is a good place for teachers to start when looking for specific information. Read about hot topics, visit the multimedia gallery, read about the history of NASA, access a frequently asked questions section, and find out about the United States' space program. The site map is a good place to get your bearings.

The Earth Observatory’s mission is to share with the public the images, stories, and discoveries about climate and the environment that emerge from NASA research, including its satellite missions, in-the-field research, and climate models.

Welcome to the Photojournal. The Photojournal is your interface to the Planetary Image Archive (PIA) contained within the Planetary Data System Imaging Node. The home page graphic serves as a high-level entry point to the thousands of high-resolution images and their accompanying products which have been made available to the public from data returned by various JPL missions over the course of many years.