Incoming Resources
- An introduction to the solar system, edited by Neil McBride and Iain Gilmour
- Orbiting the sun, planets and satellites of the solar system, Fred L. Whipple
- Encyclopedia of the solar system, editors, Lucy-Ann McFadden, Paul R. Weissman, Torrence V. Johnson
- Ancient Earth, ancient skies, the age of Earth and its cosmic surroundings, G. Brent Dalrymple