Multimedia Gallery
The Discovery FilesAll-Star
From their laboratories on a rocky planet dwarfed by the vastness of space, Clemson University scientists have managed to measure all of the starlight ever produced throughout the history of the observable universe. According to the new measurement, the number of photons (particles of visible light) that escaped into space after being emitted by stars translates to 4 times 10 to the 84th power, or 4 followed by 84 zeroes.
Credit: National Science Foundation/Karson Productions
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