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  He published his heliocentric model according to wich the planets revolved around the sun.
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  He was borned and it was seen like the cientific revolution
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  built the first telescope using mirrors instead of lenses
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  -discovered the planet Uranus
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  the work carried by Adams , Galle and Leverrier lead to discovery Neptune
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  1882- Hans Geiger invents the detector of radioactive particules
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  discovered the planet Pluto
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  Albert Einstein continues the expansion of the universe with the Hubble
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  Discovered of the first extra-solar planets
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  it was descovered the theory of the Big Explosion
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  It is comformed by a sun , 8 planets , comets , asteroids , stars ,etc
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  Have a solid surface
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  Do not have a solid surface .
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  Characteristics:colour, size, light, brightness, age.
 There are binary and cluster
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  In the 17th century led to huge advances in the study of Astronomy
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