A guide to the planets of the Solar System - BBC Sky at Night Magazine
The 'Space Weight' Calculator
Solar System - Wikipedia
The Planets in Our Solar System in Order of Size - Universe Today
Planets - NASA Science
Pluto IS a planet and so are nearly 400 objects in our solar system, claims space expert, Science, News
NASA scientists find 5,000 plus planets beyond Earth's solar system
Our solar system's planets - Astronomy's Space & Beyond Box
Planets
Solar system: planets and facts about solar system