Orreries price range are from ten pound to thousands of pounds , based on the materials and size's used to make it .
The first modern orrery was built by George Graham and Thomas Tompian.
George passed the design on to Instrument make John Rowley to make a copy for Prince Eugene of savoy . John was Soon told to make another for his patron Charles Boyle the 4th , Earl of orrery . Wich was how the device took its name .
The orrerys Purpose is to show tha planets and how they orbit the sun . Though orrerys were not as large as they can be now because they only thought there was 5 planets .
An orrery is normaly a mechanical device , So they can be driven by a clockwork mechanism .
They can come in all different materials such as metal's and gold's . Or a typical easy material wood .
You would normaly see an orrery in a school or in science musiems . As there not really that popular . Because most people just look the planets up on the internet .
The largest orrery was built in 1744 and its still in use today. It was built into the ceiling of someone's living room, and the materials used include; wooden tyres, disks and nails. It is all very accurate with each planets time taken to move around the Sun. These materials were used probably because of availability at the time and the tools they had, for example they wouldn't have had a welder, therefore no metal could be used.
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