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In 1925, an American astronomer by the name of Edwin Hubble, provided observational evidence that all galaxies are receding from one another, which implies that the universe is expanding. The expansion of the Universe is the most imposing discovery of modern science. Today it is a firmly established concept and the only debate centers around the way this is taking place. It was first suggested by the general theory of relativity and is backed up by physics in the examination of the galactic spectrum; the regular movement towards the red section of their spectrum may be explained by the distancing of one galaxy from another. Thus the size of the Universe is probably constantly increasing and this increase will become bigger the further away the galaxies are from us. The speeds at which these celestial bodies are moving may, in the course of this perpetual expansion, go from fractions of the speed of light to speeds faster than this.The following verse of the Qur'an where God is speaking, may perhaps be compared with modern ideas: "The heaven, We have built it with power. Verily. We are expanding it." [51:47] The Qur’aan mentioned the expansion of the universe, before man even learnt to build a telescope! Some may say that the presence of astronomical facts in the Qur’aan is not surprising since the Arabs were advanced in the field of astronomy. They are correct in acknowledging the advancement of the Arabs in the field of astronomy. However they fail to realize that the Qur’aan was revealed centuries before the Arabs excelled in astronomy.