Astronomers tallying up all the normal matter—stars, galaxies and gas—in the universe today have come up embarrassingly short of the total matter produced in the Big Bang 13.6 billion years ago. In ...
Learn why aurora colors glow green and red, how ionized particles collide with atmosphere layers, the physics of green aurora ...
The amount of matter present in the universe simply hasn't added up. Astronomers accounting for all the normal matter in the universe that makes up stars, galaxies, and gasses have fallen far short of ...
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