View Full Version : How Much Light Has The Universe Created Since the Big Bang?

2013-May-27, 12:40 PM
The universe, most cosmologists tell us, began with a bang. At some point, the lights turned on. How much light has the universe produced since it was born, 13.8 billion years ago? It seems a difficult answer at first glance. Turn on a light bulb, turn it off and the photons appear to vanish. In [...]

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