1 What is the universe made of?
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Composition. The universe is composed almost completely of dark energy, dark matter, and ordinary matter. Other contents are electromagnetic radiation (estimated to constitute from 0.005% to close to 0.01% of the total mass-energy of the universe) and antimatter.
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Explanation:
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.
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