The star cluster known as NGC 1866, on the edge of the Large Magellanic Cloud. The observable universe contains at least two trillion galaxies and a trillion trillion stars.
Credit:ESA/Hubble & NASA
In one of those exercises that you think should be impossible or perhaps a punishment for some infraction, a team of astronomers has now measured the total amount of light that has ever been produced by all the stars in our universe.
From The New York Times
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