2 ms·

Thanks, that's helpful to understand it. What does "a few" mean in this context?

• cygx 3y ago
  Cf https://en.wikipedia.org/wiki/Scale_factor_%28cosmology%29 https://en.wikipedia.org/wiki/Scale_factor_%28cosmology%29 < 47k years: radiation-dominated era < 9.8G years: matter-dominated era > 9.8G years: dark-energy-dominated era