The Sun, a 5 billion year old nuclear fusion reactor
The Sagan Planet Walk is a scale model of the Solar System in the City of Ithaca, NY. The model stretches from the center of the Commons in downtown Ithaca to the Sciencenter 1.2 km away.
Mercury, the Sun's nearest neighbor
Venus, where it's always raining sulphuric acid
Earth, our home planet
Mars, the red planet
The Asteroid Belt
Jupiter, the star that failed
Saturn, a planet takes 30 years to complete a trip around the Sun
Uranus, a planet that seems to be lying on its side
Neptune, the planet that has yet to complete a single 37-billion-kilometer trip around the Sun
Is Pluto a major planet or simply one of the largest trans-Neptunian objects?