NASA
Nasa: Apollo Lunar Surface Journal
"The Apollo Lunar Surface Journal is a record of the lunar surface operations conducted by the six pairs of astronauts who landed on the Moon from 1969 through 1972. The Journal is intended as a resource for anyone wanting to know what...
TED Talks
Ted: Ted Ed: The Sun's Surprising Movement Across the Sky
Suppose you placed a camera at a fixed position, took a picture of the sky at the same time every day for an entire year, and overlaid all of the photos on top of each other. What would the sun look like in that combined image? A...
Smithsonian Institution
Smithsonian Libraries:chasing Venus: Observing the Transits of Venus 1631 2004
An online website, from a historical perspective, of the study of the transit of Venus between the sun and the earth.
NASA
Nasa: Astronomy Picture of the Day: Lunar Dust and Duct Tape
Dust, a common and usually minor problem on Earth, presented a major challenge for the Apollo astronauts on the Moon. Here's an interesting solution created by the Apollo 17 crew.
NASA
Nasa: Astronomy Picture of the Day: Apollo 16: Exploring Plum Crater
This is a photograph of Charles M. Duke, Jr. collecting rock samples at the Descartes landing site. Duke stands by Plum Crater while the Lunar Roving Vehicle waits parked in the background. The Lunar Roving Vehicle allowed the astronauts...
NASA
Nasa Space Science Data Archive: Clementine Mission
Contains the official record of the Clementine mission's survey of the moon, with links to more detailed information about the spacecraft and its mission. Includes images of the mission and planets.
NASA
Nasa Space Science Data Archive: Lunar Exploration Timeline
Available in both HTML and Shockwave formats, this site is a visual timeline of US, Soviet, and Japanese Lunar exploration. Each point of the timeline links to text information about that spacecraft and mission.
NASA
Nasa: Mars Exploration: Fun Zone!
This site is filled with information on NASA's Mars Exploration Program. Use this informative site in Spanish or English. Play games while learning about Mars.
Khan Academy
Khan Academy: Codex Leicester: Fossils/mountains, Moon/tides
An excerpt from Leonardo da Vinci's Codex Leicester. Find out how this "Renaissance man" observed the Earth and learned more about tides, moons, and fossils in the mountains.