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A trillion years is 1,000,000,000,000 years.

In astronomy, it is probably a meaningless concept, because according to our current understanding of the universe, space and time began with the Big Bang around 14 billion years ago. So, looking back, there is no 15 billion years or more in astronomy.

Looking forward, there is too much uncertainty about the amount of matter in the universe to judge whether it will continue to expand and eventually burn away, or reverse into a big crunch which may be followed by Big Bang 2. However, there will be no link between our universe and universe 2. So whichever way it works out, current theories suggest that the universe as we know it will not survive a trillion years.

So many questions to answer, so little time!

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12y ago
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13y ago

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Q: What in astronomy is a thousand million years?
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