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All the Light There is to See? 4 x 10⁸⁴ Photons.

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 (yes, you read it correctly!) stars.

Astronomers have calculated all the light ever produced by all the stars in the cosmos. It’s a lot, but on the cosmic whole, not that much.

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