Half the matter in the universe was missing – we found it hiding in the cosmos
- Written by J. Xavier Prochaska, Professor of Astronomy & Astrophysics, University of California, Santa Cruz
Diligence, technological progress and a little luck have together solved a 20 year mystery of the cosmos.CSIRO/Alex Cherney, CC BY-NDIn the late 1990s, cosmologists made a prediction about much ordinary matter there should be in the universe. About 5%, they estimated, should be regular stuff with the rest a mixture of dark matter and dark energy....
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