• Around our Sun circle nine planets.
  
• The planet that circles closest to the Sun is Mercury.
  
• The diameter is 4878 kms.
  
• Further away circles Venus. The diameter is 12,104 kms.
  
• Then you see Earth. The diameter is 12,756 kms.
  
• Still further away is Mars circling. The diameter is 6788 kms.
  
• All mentioned are rocky planets. After this we see the giant planets. These planets exists mainly of gas. Hydrogengas for example.
  
• The giant planets are:
  
  • Jupiter, diameter 142,893 km
    
  • Saturn, diameter 120,000 km
    
  • Uranus, diameter 50,800 km
    
  • Neptune, diameter 48,600 km
    
• Pluto exists of a combination of ice and stones. Probably the planet originates somewhere else, but definitely not close to the Sun. The diameter is 2280 kms.