Based upon the Exploring the Planets gallery at the National Air and Space Museum in Washington, DC, this site provides information about our solar system and its exploration. The gallery begins with a Discovery Section, which explores the development of astronomical thought, beginning with the Greeks, the Renaissance, and Galileo, and ending with satellites and the discovery of new planets. A section on Exploration Tools investigates the past, present and future of earth-based exploration, telescopes, spacecraft, landers, orbiters and rovers. The Planetary Comparisons section discusses similarities and differences between planets such as their atmospheres and geography. An entire section is devoted to the planets themselves with data sets showing statistics on size, mass, orbits, satellites and more. Each planet and the asteroids have their own page with images, exploration facts and other data. There is also a section about comets discussing their discovery, history, observations, anatomy and images.
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