The Transit of Venus is similar to a solar eclipse, where -- from the perspective on Earth -- Venus passes in front of the Sun. This event does not happen very often. In fact, no one alive had witnessed this phenomenon...

As this illuminating history of the Martian canals controversy notes, when sky gazers began examining the planets through telescopes in the seventeenth century, Mars was a relatively featureless disc compared to the...

The Universe Forum is the national center for teaching and learning about the structure and evolution of the universe. Sponsored by NASA and based at the Harvard-Smithsonian Center for Astrophysics, the Forum uses the...

This site discusses the planet Uranus. Some of the topics discussed are the atmosphere, interior, and surface of Uranus, missions to, its moons and rings, its magnetosphere, myths, and the latest news from Uranus. There...

This site offers information about the solar system and planets, space missions, the technology used on these missions, the data and information gathered. A broad range of topics is covered, with more detailed...