<p>I was taking a look at this tool to calculate habitable zones: <a href="https://depts.washington.edu/naivpl/sites/default/files/hz.shtml" rel="nofollow noreferrer">Calculation of habitable zones</a> which is pretty simple: you need to input Teff in Kelvins and Stellar Luminosity in solar units. Then I was wondering if this calculation is affected when you have binary systems and the tool just doesn't work anymore, or each habitable zone can be calculated separately. Do the effects of both stars add up and alter the calculation? </p>

CC BY-SA 4.0
2020-01-28T17:14:49.687Z
It's complicated. There's some relevant info at https://astronomy.stackexchange.com/q/385/16685
PM 2Ring
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2020-01-28T19:26:43.317Z
From that link everything seems to point that they affect the calculation
Pablo
CC BY-SA 4.0
2020-02-03T21:48:30.413Z
Does this answer your question? [Could there be Earth-like planets in binary or trinary systems?](https://astronomy.stackexchange.com/questions/385/could-there-be-earth-like-planets-in-binary-or-trinary-systems)
Chappo Hasn't Forgotten
CC BY-SA 4.0
2020-02-03T22:02:48.747Z
The first link does, the link posted by PM 2Ring, specifically this part "their combined energy extends the habitable region farther away than would exist around a single star."
Pablo
<habitable-zone>
Do secondary stars in binary systems affect how the habitable zone is calculated or they can be calculated separately?
Pablo
# Do secondary stars in binary systems affect how the habitable zone is calculated or they can be calculated separately?

(Asked by: username_0 on 2020-01-28)

I was taking a look at this tool to calculate habitable zones: [Calculation of habitable zones](https://depts.washington.edu/naivpl/sites/default/files/hz.shtml) which is pretty simple: you need to input Teff in Kelvins and Stellar Luminosity in solar units. Then I was wondering if this calculation is affected when you have binary systems and the tool just doesn't work anymore, or each habitable zone can be calculated separately. Do the effects of both stars add up and alter the calculation?

**Tags:** habitable-zone
> **Comments:**
> **username_1**: It's complicated. There's some relevant info at https://astronomy.stackexchange.com/q/385/16685  
> **username_0**: From that link everything seems to point that they affect the calculation  
> **username_2**: Does this answer your question? [Could there be Earth-like planets in binary or trinary systems?](https://astronomy.stackexchange.com/questions/385/could-there-be-earth-like-planets-in-binary-or-trinary-systems)  
> **username_0**: The first link does, the link posted by PM 2Ring, specifically this part "their combined energy extends the habitable region farther away than would exist around a single star."  

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