Orrery: The Solar System in Action
- Provides illustrated descriptions of each planet, as well as comets, asteroids and other bodies.
- http://www.harmsy.freeuk.com/orrery.html

IAU Resolutions 5 and 6
- Text of the official definition of a planet in the Solar System voted on by the International Astronomical Union on August 24, 2006 and a statement about the classification of Pluto.[In pdf format]
- http://www.iau.org/fileadmin/content/pdfs/Resolution_GA26-5-6.pdf

science@nasa: Fun and Games: The Solar System
- Activities include figuring out how much you would weigh on another planet and comparing the sizes of the planets.
- http://science.hq.nasa.gov/kids/solar_system.html

Bob the Alien's Tour of the Solar System
- Information about planets, moons, comets, asteroids, stars and galaxies.
- http://www.bobthealien.co.uk/

The Nine Planets
- Offers general information on each planet complete with orbits, diameter, composition and mass. Also features a history of each, illustrations, further reading and a FAQ section on general astronomy.
- http://seds.org/nineplanets/nineplanets/intro.html

CyberSpace
- An interactive journey through space to learn about the solar system and what lies beyond. Includes current astronomical information and news and a section for questions answered by professional astronomer.
- http://library.thinkquest.org/12659/main.html?tqskip1=1&tqtime=0615

Exploring the Planets
- A collection of pictures, graphics and articles about the solar system and individual planets. From the National Air and Space Museum.
- http://www.nasm.si.edu/ceps/etp/etp.htm

Eternal Light Beacon - Space Day 2005
- This website is a science project created for the Space Day 2005 competition. We are a team of 7 homeschoolers in 6th through 8th grade from Chieftain Christian Academy.
- http://www.eternallightbeacon.com

Interactive Solar System Tutorial
- Learn about the Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto with this interactive animated facts game.
- http://www.apples4theteacher.com/starwarp2.html

Solar System Trading Cards
- Collect Solar System trading cards as you answer trivia questions correctly.
- http://amazing-space.stsci.edu/resources/explorations/trading/game.htm

Thinkquest: Planets, Moons and Stars
- Provides basic information about the solar system.
- http://library.thinkquest.org/J002809/main.html

Earthrise : A Tour of Our Solar System
- Designed by kids, for kids, this is a great introduction to the 9 planets. Features video, sounds, and a guided tour.
- http://library.thinkquest.org/25401/

Astronomy.com-Astro for Kids
- Tells about each of the planets in our solar system and the sun.
- http://www.astronomy.com/asy/default.aspx?c=a&id=1091

The Solar System
- Brief presentation of the sun and the nine planets.
- http://www.oswego.org/staff/kbonnell/lectora/solarsystem/index.html

Window to the Universe
- Learn about asteroids, comets, planets, and the sun. Also contains facts, news, and pictures.
- http://www.windows.ucar.edu/tour/link=/our_solar_system/solar_system.html

Solar System Exploration
- Describes NASA's program to explore the solar system.
- http://sse.jpl.nasa.gov/kids/

Exploring Planets in the Classroom
- More than 25 hands-on science activities about geology, earth, planetary, and space sciences.
- http://www.spacegrant.hawaii.edu/class_acts/index.html

Space Day 2004 - Space Trek Challenge
- The Foster Homeschool Families' submission for the SpaceDay.org 2004 Space Trek. Includes journals, stories, and background information.
- http://www.plomet.com

Our Solar System in Pictures
- Pictures and quizzes about all the planets in the solar system. This site is especially useful to middle school students studying the solar system.
- http://www.the-solar-system.net/

With Peter and Paul Around the Galaxy
- Peter and Paul fly with you through space and explain to you everything about our solar system. Click on each planet and you will learn everything about it.
- http://www.kids-and-space.com

The Virtual Solar System
- A guide to the solar system for visitors featuring a scale model, interactive quiz, text, and images.
- http://www.solarsystem.org.uk/

Alex's Galaxy
- Contains a photograph gallery of the major celestial bodies in the solar system.
- http://alexpollard.com/space/

How Big is the Solar System
- Also known as "The Earth as a Peppercorn." A scale model of the solar system.
- http://www.noao.edu/education/peppercorn/pcmain.html

Earth and Moon Viewer
- View the earth and moon from many vantage points and in multiple ways. Provides latitude and longitude positions as well as the altitude and time from which the images were taken.
- http://www.fourmilab.ch/earthview/vplanet.html

Solar System Worksheets
- Printable worksheets, logic problems, word searches, and puzzles.
- http://www.edhelper.com/SolarSystem.htm

The Planets for Kids
- A student-based website focusing on general information about the planets, moon, and sun.
- http://www2.lhric.org/pocantico/fitzgerald/99/planets.htm

Solar System Live
- Includes information and images related to the solar system and its inner planets.
- http://www.fourmilab.ch/solar/solar.html

Planetary Fact Sheets
- Factual information on the planets in the solar system, from Mercury to Pluto and beyond.
- http://nssdc.gsfc.nasa.gov/planetary/planetfact.html

Astronomy for Kids
- Offers a journey through the stars in an attempt to explore the universe. Includes facts about the planets, puzzles, sky facts and maps.
- http://www.dustbunny.com/afk/

F9 Kids
- Teaches kids some basic facts about the nine planets, along with stories, games, and a 'meet the kids' section.
- http://kids.f9.net.uk/

Views of the Solar System
- An in-depth resource to the Solar System. Including articles about each part of the Solar System and its planets.
- http://www.solarviews.com/

The Planets
- A collection of many of the best images from NASA's planetary exploration.
- http://pds.jpl.nasa.gov/planets/

Live from the Hubble Space Telescope
- Provides an insiders' view of what it's like to work with Earth's most powerful space telescope.
- http://www.passporttoknowledge.com/hst/

Passport to the Solar System
- Provides an overview of the sun and each of the nine planets. Also includes biographies of researchers.
- http://www.passporttoknowledge.com/solarsystem/

Solar System Simulator
- Offers the possibility to see what the Sun and every planet and their major moons look like from any other place in the Solar System at nearly any date at any time. The pictures are very accurate and in color.
- http://space.jpl.nasa.gov/