Cosmic Microwave Background Articles

April 6, 2020

Big Bang: Key PointsHubble's law (redshift of galaxies) and the Doppler effect provide direct evidence that the universe is expanding away from our…

September 24, 2016

Before decoupling, photons and charged particles were in good thermal contact: though the primordial plasma might have varied in temperature…

October 5, 2015

Astronomers Arno Penzias and Robert Wilson discovered the cosmic microwave background in 1965. They were not looking for it.They were…

September 18, 2015

The early universe was hot. So hot that nuclei boiled. The great thermal energy of the universe overwhelmed the confining efforts of the…

September 11, 2015

This is a picture of the cosmic microwave background:Fig 1. The cosmic microwave background as seen by the European Space Agency's…