The answer is ... 16 I think
Answer:
none
Explanation:
all i could see was blue sky
The best answer for this question would be:
2. Cosmic Background Radiation
The Cosmic Background Radiation are when the heat of a planet is measured by the left over heat of it. This is based on the “Big bang Theory” wherein the planets were formed because it was once a very hot radiation.
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I believe your answer is the year 2020
