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The Universe is thought to consist of three types of substance: normal matter, ‘dark matter’ and ‘dark energy’. Normal matter consists of the atoms that make up stars, planets, human beings and every other visible object in the Universe. In the currently popular model of the Universe, 70% is thought to be dark energy, 25% dark matter and 5% normal matter. The Universe consists of everything that exists anywhere in space. All the heavenly bodies such as the sun, the moon and the stars which are seen with the naked eye and many more celestial bodies such as planets, asteroids, satellites, comets, meteors, meteorite, which are not seen with the naked eyes. All these heavenly bodies form the Universe.