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The Weight of the World, Confirmed

Caption: This drawing shows the supercomputers the researchers used to calculate the masses of protons, neutrons and other "hadrons," which collectively make up nearly all the mass of the visible universe. Each "hadron" consists of three quarks (the red, yellow and blue spheres) held together by gluons. This image relates to an article that appeared in the Nov. 21, 2008, issue of Science, published by AAAS. The study, by Dr. S. Durr and colleagues at Universitat Wuppertal in Wuppertal, Germany was titled "Ab Initio Determination of Light Hadron Masses."

Credit: Image courtesy of Forschungszentrum Jülich/Seitenplan with material from NASA, ESA and AURA/Caltech

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