All the Light There is to See? 4 x 10⁸⁴ Photons by DENNIS OVERBYE

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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.

Published: December 3, 2018 at 01:00AM

from #NYT Science Read the full article here: https://ift.tt/2KReJum