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Researchers measured all visible light ever produced in the universe – Axios

Clemson University researcher, based on images from NASA's Fermi Gamma-Ray Space Telescope, claims for the first time to have met…

Clemson University researcher, based on images from NASA’s Fermi Gamma-Ray Space Telescope, claims for the first time to have met all the star lights ever generated during the history of the observable universe.

With the numbers: ] According to the new data, published in the journal Science on Friday, the number of photons – visible light particles – ranges from stars to 4 times 10 to 84th power.

  • Or, to express it in another way, the researchers amounted to 4,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 photons.

Why It Matters: The new study provides insight into the history of star formation during much of the universe’s 13.7 billion lifetime. Specifically, the research helps to measure extragalactic background light, which contains information about the stars’ history dating back to the universe’s early history. This is a scientific breakthrough, as previous attempts have been stymied by the weakness of remote galaxies and the inability of telescopes to detect such dim light.

  • In addition, a better perception of the history of the star formation will inform future missions aimed at looking at our early history, such as James Webb Space Telescope, which is scheduled to launch in 2021. [19659006] The Great Image: According to A press release that accompanies the new study, while the number of photons is extremely large, is most of the visible light that reaches the ground dark, given the size of the universe. Much of the visible light, the emission states, is “equivalent to a 60-watt incandescent bulb seen in full darkness about 2.5 miles away.”

    What’s Next: “The first billion years of our universe’s history is a very interesting epoch that has not yet been investigated by current satellites,” said Ajello. “Our measurement allows us to peek inside it. Maybe one day we’ll find a way to see all the way back to Big Bang. This is our ultimate goal. “

    Go deeper: Researchers track neutrino to the source outside our galaxy

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