Completar frases U.7: Gapped text Versión en línea Complete the following explanation of some aspects of the lesson por Rubén Campos 1 outer planets 'small heliocentric Milky Geocentrism dwarf Earth planets satellites inner Sun Astronomy bodies' Way' 'The planets Sun The is the brand of Physics that studies the Universe . In its beginings , it was told that the was the centre of the Universe . That model was called and it was believed to be true until the 16th century when Nicholas Copernicus created the model , which says that the is the centre of the Universe . Nowadays , we consider that Copernicus' theory is only partly true as the Sun is only the centre of its system but not the centre of the whole Universe . The Solar System belongs to a galaxy called . The Solar System is form by The , a star formed by hydrogen and helium ; the , such as Venus or the Earth , the , such as Jupiter or Saturn , the , such as Ceres or Eris , the , such as the Moon and the asteoids and comets , which are generally named .
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