Suppose the number density of galaxies in the universe is, Other Subject

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Suppose the number density of galaxies in the universe is

Suppose the number density of galaxies in the universe is, on average, 3 x 10^-68 galaxies per cubic meter. If astronomers could observe all galaxies out to a distance of 10^10 light years, how many galaxies would they find?

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Other Subject: Suppose the number density of galaxies in the universe is

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Other Subject: Suppose the number density of galaxies in the universe is

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