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We're running out of time! (startrek.website)

submitted 7 months ago by [email protected] to c/memes

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[–] teft 2 points 7 months ago (1 children)

No, the expansion will start in about 5 billion years. The subgiant expansion phase will last for about 1 billion years. The earth may or may not be engulfed during the expansion as the best guess is the sun will expand to somewhere between venus and earth's orbit. The planet will be uninhabitable but again, the expansion won't start for about 5 billion years.

You're the second person in as many days that I've come across saying the red giant expansion phase will start in 500 million years. Where are you guys getting this info?

[–] [email protected] 2 points 7 months ago (1 children)

I may have confused expansion with brightness, it is increasing steadily and will make our planet inhabitable in that time frame. From astrophysist Paul M. Sutter https://www.space.com/solar-system-fate-when-sun-dies

[–] teft 2 points 7 months ago (1 children)

That makes sense. I actually had to go look up to make sure I wasn't giving out wrong information since you were the second person. Maybe the other guy had read this article too. Glad we got it sorted. :)

[–] [email protected] 2 points 7 months ago

I looked up more and found another source of worries with a slightly shorter deadline https://www.theguardian.com/science/2023/sep/25/supercontinent-could-make-earth-uninhabitable-in-250m-years-study-predicts