ELi5: Do all stars have habitable zones?

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So I know that stars have habitable zones where, when you get to a certain distance, a planet within this zone is in a comfortable position to host life. But do all stars have this habitable zone or does the certain nature of stars get rid of the possibility of a habitable zone?

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Anonymous 0 Comments

Some stars I imagine would be too unstable. This would mean that they either bathe their system in absolutely huge solar flares that would wipe out any life on a planet in what would be the habitable zone or that their energy output goes up and down so the habitable zone would be moving in and out too quickly.

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