A lengthy scholarly article that discusses the geologic time scale, its history of development, age-dating events that occurred in different eras, and how absolute and relative dating are used to assess the ages of the Earth and Moon....

Find lots of information about our planet Earth here. Covers basic facts, Earth's history, layers of the Earth, plate tectonics, composition of the atmosphere, Earth's magnetic field, and some facts about our moon.

Explore the mythology, structure, observational history, gravitational force, and orbit of Earth's Moon.

This resource gives a detailed explanation of the stages that the Earth and the solar system went through beginning with their origins in the Big Bang up to the present time.

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.

This site from Cornell University provides a discussion of how Aristarchus arrived at his conclusions of the distance from the Earth to the Sun and Moon. Also has his methods for determining the size of the Moon and the Sun.

A profile of the ancient Greek mathematician, geographer, and astronomer, Eratosthenes. Looks at his many accomplishments, including measuring the circumference of the Earth and the distance to the Moon and the Sun. Includes links to...

The Earth, the moon, the stars and just about everything in between has a magnetic field, and scientists use magnetometers when they need to know the strength of those fields.