Showing posts from November, 2019

Observable universe From Wikipedia, the free encyclopedia

Observable universeFrom Wikipedia, the free encyclopedia
Observable universe
Visualization of the whole observable universe. The scale is such that the fine grains represent collections of large numbers of superclusters. The Virgo Supercluster—home of Milky Way—is marked at the center, but is too small to be seen. Diameter8.8×1026 m(28.5 Gpc or 93 Gly)[1]Volume4×1080 m3[2]Mass (ordinary matter)1.5 x 10 53 kg [3]Density (of total energy)9.9×10−27 kg/m3 (equivalent to 6 protons per cubic meter of space)[4]Age13.799±0.021 billion years[5]Average temperature2.72548 K[6]ContentsOrdinary (baryonic)matter (4.9%)Dark matter (26.8%)Dark energy (68.3%)[7]

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