Question

why is the universe considered to be everlasting

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Answer 1

Answer:

For steady-state advocates, the Universe is infinite in time and space. It has always existed and will exist forever, keeping its general characteristics of homogeneity and density unchanged.

Explanation:

Answer 2

Explanation:

For steady-state advocates, the Universe is infinite in time and space. It has always existed and will exist forever, keeping its general characteristics of homogeneity and density unchanged. But Hubble had already shown in the late 1920s that galaxies move away from each other.

To be clear, a truly infinite universe means that anything that is not impossible (no matter how obscure) will happen, must happen and must happen, weirdly, an infinite number of times.

The observed average density of baryonic matter in the universe is about 4.2 x 10^-28 kg m^(-3), so the total mass of the universe is about 1.6 x 10^53 kg. That's big, but not infinite.

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