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The sentence: "If a super-Earth is ejected from its star system and has a dense atmosphere and watery surface, it could sustain life for tens of billions of ye
by njarboe 4y ago
The sentence:
"If a super-Earth is ejected from its star system and has a dense atmosphere and watery surface, it could sustain life for tens of billions of years, far longer than life on Earth could persist before the sun dies."
is wrong according to the article it references in support. See this comment for details[1].
[1] https://news.ycombinator.com/item?id=32948054 https://news.ycombinator.com/item?id=32948054
- denton-scratch 4y agoYeah, either you orbit at a safe distance, or you get ejected and become a rogue planet. I'm rather taken with this idea of billions of rogue planets, wandering around the Milky Way, carrying life that's billions of years old. Such a rogue might get captured by a star-system's Oort cloud, gradually drift towards the star, and eventully evince more complicated life. In fact I'm not aware of strong evidence that Earth isn't a rogue (it's about the same age as the Sun, but that's circumstantial, right?)