How do we know that the universe is about 14 billions year old? I am having a hard time understanding it, how we can measure (the age and size) of something that we are not able to grasp?
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From my limited understanding, so more of a 5 year old explaining to a 5 year old, we’ve recorded the rate of the universes expansion, since it is expanding, tracked the path of the expansion, so where the universe is going as it expands, then based on the current speed and path of the expansion, reverse engineered where the path the universe is taking originated, and used that data and math I dont understand to calculate the age.
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