The picture of the oldest light in the Universe [video]

The oldest light cannot be seen with the naked eye because it is in the microwave band. It is also called Cosmic Background Radiation because it can be found everywhere and, during the 13 billion years of travelling around its frequency shifted from the light we can see to microwave.

The Cosmic Background Radiation shows the temperature of empty space: 2.72°K (-270°C). Kinda cool isn’t it? Did you know that metal plates welding is done easily in space? Why? Because you simply need to put two metal plates in contact and they will simply mold together due to the low temperatures. Thanks C.G.P. Grey for the explanations.

You may want to visit BigBangRegistry to see a bigger picture of Cosmic Background Radiation.

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