Respuesta :
You should almost go to the extreme right to find the horizontal axis.
What was the universe's average temperature when it was only one second old?
Up to 0.0001 seconds after the Big Bang, the universe expanded and cooled, reaching a temperature of around T=1013 K. Only matter remains after antiprotons and protons annihilate, although there are a lot of photons produced for each proton and neutron that survives.
Over the past 14 billion years, how has the universe's temperature changed?
It was discovered that the average temperature of gas throughout the cosmos had increased more than ten times during that time and had now reached nearly 2 million degrees Kelvin, or 4 million degrees Fahrenheit.
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