P1- The Earth in the universe

The Solar System

• 8 planets orbit the sun.
  
• There are other things such as dwarf planets, comets and dust.
• Some planets are visable with the naked eye.
• Stars are huge, very hot and very far away.
• Planets are smaller than stars and just reflect sunlight.
• The solar system was formed about 5,000 million years ago from dust and gas.
• Particles began to collapsed in together as they moved closer together gravity keept them together.
• This collapse caused a protostar.
• This protostar when at a high enough temperature would perform a process called fusion, having hydrogen nuclei join together to make helium.
• Asteroids and comets are made of stuff left over the formation of the Solar System.
  
• Comets are made of rock, dust and ice.

Beyond…