/u/allfangs's posts in /r/askscience

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Estimates of the rate of star formation predict that the peak habitability of the universe will occur about ten trillion years from now, a thousand times the current age of the universe. Do most cosmologists believe that we happen to be extremely early observers then?

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The star Stephenson 2-18 has a volume about 10 billion times that of the sun, but only has a mass on the order of about 10 times bigger. How does such an absurdly low density star exist?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Estimates of the rate of star formation predict that the peak habitability of the universe will occur about ten trillion years from now, a thousand times the current age of the universe. Do most cosmologists believe that we happen to be extremely early observers then?	1
The star Stephenson 2-18 has a volume about 10 billion times that of the sun, but only has a mass on the order of about 10 times bigger. How does such an absurdly low density star exist?	1