ASTRONOMERS HAVE FOUND THE UNIVERSE'S MISSING MATTER
For decades, some of the atomic matter in the universe had not been located. Recent papers reveal where it’s been hiding.
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ASTRONOMERS HAVE FINALLY found the last of the missing universe. It’s been hiding since the mid-1990s, when researchers decided to inventory all the “ordinary” matter in the cosmos—stars and planets and gas, anything made out of atomic parts. (This isn’t “dark matter,” which remains a wholly separate enigma.) They had a pretty good idea of how much should be out there, based on theoretical studies of how matter was created during the Big Bang. Studies of the cosmic microwave background (CMB)—the leftover light from the Big Bang—would confirm these initial estimates./.../
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