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Astronomers explain where the universe's missing normal matter lives

According to the Big Bang theory, normal matter composed of protons, neutrons, and electrons should account for roughly 5% of ...
Space.com on MSN

Most normal matter in the universe isn't found in planets, stars or galaxies – an astronomer explains where it's distributed

But the Big Bang theory predicts that about 5% of the universe's contents should be atoms made of protons, neutrons and electrons. Most of those atoms cannot be found in stars and galaxies – a ...