The Solar System

The Solar System

1. Observing objects in space

   • Luminous objects in space give out visible light
     • These visible light waves allow people to study different objects
   • Many objects don't give out visible light
     • They emit radio waves and microwaves
       • Different types of telescopes are used to detect the different waves
         • Scientists use this data to make conclusions about the Universe

2. Solar System models

   • Geocentric model
     • Ptolemy's geocentric model
       • Planets moved in small circles as they orbited the Earth
   • Heliocentric model
     • Copernicus's heliocentric model
       • A model with the Sun at the centre of the Solar System

3. Telescopes

   • With the invention of the telescope, it allowed scientists to see objects in space in much greater detail
     • Galileo discovered four of Jupiter's moons using a telescope
       • By plotting the movements he showed that not everything orbited the Earth
         • This and other observations supported Copernicus's idea
           • Supported the heliocentric model
     • As telescopes improved more discoveries were made
       • Like the planets Uranus and Neptune and the dwarf planet Pluto

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