Incoming Resources
- Twenty worlds, the extraordinary story of planets around other stars, Niall Deacon
- Planets, a Smithsonian guide, Thomas R. Watters
- Solar system astrophysics, background science and the inner solar system, Eugene F. Milone and William J.F. Wilson
- The planetary system, David Morrison, Tobias Owen
- Is Pluto a planet?, a historical journey through the solar system, David A. Weintraub
- The hunt for planet X, new worlds and the fate of Pluto, Govert Schilling
- When the Earth had two moons, cannibal planets, icy giants, dirty comets, dreadful orbits, and the origins of the night sky, Erik Asphaug
- The gas giants, Jupiter, Saturn, Uranus, and Neptune, by KS Mitchell
- The discovery of Neptune
- Earth, moon, and planets, [by] Fred L. Whipple