Entries by nikkkom

Learn about the Big Bang and the Expansion of the Universe

The “ordinary Big Bang and expansion” (no inflation, no dark energy) Einstein’s General Relativity allows a solution (FLRW metric) where an empty Universe expands. Imagine that you have particles (say, hydrogen atoms) in a cubic grid with exactly 1 light-year between nearest particles. (We assume that their mass is so tiny that this Universe essentially…