Comments by "bj0rn" (@TheLivirus) on "Jak daleko se můžeme dostat? Limity lidstva." video.

  1. Why did you illustrate the observable universe as a cylinder rather than a sphere? May cause misunderstanding.
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  2. Phreaker1997 "The observable universe consists of the galaxies and other matter that can, in principle, be observed from Earth at the present time because light and other signals from these objects have had time to reach Earth since the beginning of the cosmological expansion. Assuming the universe is isotropic, the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe is a spherical volume (a ball) centered on the observer." https://en.wikipedia.org/wiki/Observable_universe You are right though, we don't know the shape of the full universe.
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