An artist's illustration of New Horizons, beyond the glow of the inner solar system (center)

How many galaxies are there in the observable universe? Not as many as we thought, according to a new study. NASA’s New Horizons probe has measured the blackness of the sky and found that there’s probably “only” a few hundred billion galaxies glowing too faintly for us to detect, much fewer than previous estimates.

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Category: Space, Science

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