This is a series of web pages on the Earth's Moon. It includes information about the Moon as observed by the eye from Earth, its orbital period, its phases, appearance and the reason it always presents one face, There is...

This website by Gregg Herres and William K. Hartmann of the Planetary Science Institute, outlines the leading hypothesis of the origin of the moon as caused by a massive impact of a comet with the early earth. It reviews...

Most planetary scientists expected that lunar samples brought to back to Earth by the six Apollo missions would confirm one of three leading hypotheses of the Moon's origin. Instead, the samples left all three...

This resource covers the general features of Saturn; the surface and interior of Saturn, such as storms and high-velocity winds; the ring system, including ring structure and composition, and spokes; and the moons of...

This case study asks students to look at the reasons why scientific programs are funded by government agencies. The case study is based on a fictional public forum, but the situation is real. Through the case, learners...