Click to Watch in HD > Big is The Universe Compared to A Human.
Watch From the smallest thing (Well, not exactly a thing but a scale) in Universe (Planck Length) to the observable universe this size comparison of the universe will show you just how big our universe is. This animation somewhat compares the size of a human to that of the universe.The observable universe is a spherical region of the Universe comprising all matter that may 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. There are at least two trillion galaxies in the observable universe, containing more stars than all the grains of sand on planet Earth. 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. Every location in the Universe has its own observable universe, which may or may not overlap with the one centered on Earth