• How Big Is the Observable Universe?

    Updated: 2023-03-31 13:00:00
    Why is the observable universe so big? Here's why the universe’s size isn’t constrained by the speed of light.

  • Is the Universe Expanding?

    Updated: 2023-03-30 13:00:00
    Einstein, Hubble and other cosmologists have demonstrated that our universe is expanding, with most galaxies moving away from each other.

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