*[http://www.windows.ucar.edu/tour/link=/our_solar_system/solar_system.html&edu=elem Windows to the Universe: our Solar System] -- This website is first-rate for kids. You can choose text appropriate for elementary, middle-school, or high-school students.
*[[w:Solar_system| Solar System on Wikipedia]]
*[http://news.bbc.co.uk/cbbcnews/hi/find_out/guides/misc/the_solar_system/newsid_3784000/3784035.stm Guide to our Solar System from CBBC Newsround]
*[http://nssdc.gsfc.nasa.gov/planetary/ National Space Science Data Center (NSSDC) planetary science page]
*[http://www.nineplanets.org/ The Nine Planets Website]
*[http://solarsystem.nasa.gov/planets/ NASA Solar System exploration] (Public domain - usable in this book - See [http://www.jpl.nasa.gov/images/policy/ acceptable use policy])
*Astronomical Society of the Pacific [http://www.astrosociety.org/education.html education page]
*[http://www.stjarnhimlen.se/comp/ppcomp.html How to Compute Planetary Positions], by Paul Schlyter
*[http://www.shatters.net/celestia/ Celestia], [[Celestia|Celestia WikiBook]] - A free space simulation that lets you and your children explore our universe in three dimensions.
