The Universe is the first release in a stunning "Space; the final frontier" series. Minted on a 65mm 3oz black proof blank showing the full observable universe. Artist's logarithmic scale conception of the observable universe with the Solar System at the center, galaxies, cosmic web and the Big Bang's invisible plasma on the edge.
The observable universe is a spherical region of the universe comprising all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time, because electromagnetic radiation from these objects has had time to reach the Solar System and Earth since the beginning of the cosmological expansion. There are at least 2 trillion galaxies in the observable universe. 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 has 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.
|Date of issue:
||COA & BOX