Is there any info you can gain from the system map about whether it's worth scanning a planet for exo?

I know it needs the atmosphere, and I know different atmosphere types spawn different types of plants, but i've read somewhere that the atmospheric pressure needs to be below 0.1 and can't be zero. Is there any concrete info on this because I cant find a solid source.

Im not having much luck at all with things like rocky ice worlds and am wondering if im wasting my time flying to these to scan them?
 
The FSS Scanner can tell you from afar
 
This is what I've been using to help with exobiology. It's not 100% accurate or up to date, but overall very useful. I believe the temperature this refers to is the mean temperature you see in the FSS.


In general, lower gravity and higher temperature worlds tend to have more valuable species. Always check out worlds with water, oxygen or nitrogen atmospheres, and sulphur dioxide is usually good too. HMC's with ammonia or carbon dioxide atmospheres often have valuable Stratum. On low-gravity worlds which also have geological activity you might find Fumerola. I don't generally bother with icy worlds with noble gas atmospheres unless they're near a nebula, and might have cool looking Electricae.
 
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As The Own of Noon mentioned above, doing a Full System Scan will tell you which planets have biological signals, but won't tell you what they might be. There's usually enough information from that scan to get a decent idea, but a lot depends on star and atmosphere type, which I can't keep straight, even with a spreadsheet.

If you want to dive deep, I highly recommend the Canonn Science Organic Scanning Guide.

If you're open to third-party tools, Observatory Core along with the BioInsights plugin will give you a lot of useful information, including a prediction of exactly which species are likely to be found on a planet without needing to fly to them and map them. You'll still need to do an FSS of the system, but that's a pretty quick process.

I have Observatory configured to give me a spoken alert for high value planets (another plugin from the EDJP page linked above) and all biologicals regardless of value. It will even let you know if it's a biological you don't yet have in your Codex.
 
Once you've done the FSS, click the third button down on the right. It won't answer all your questions until you've scanned the planet, but there are hints.
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The more you do exobiology the more you will be able to get from the info screen that Walter2 showed. From that you get the type of atmosphere and number of signals which while it's not definitive will give you a very good idea of what exobiology you are likely to find. Also knowing what kinds of exobiology occurs on what type of planet will help also.

I can recommend Marx's compendium of Codex requirements, a really helpful resource.

Depending on what you are looking for, valuable things or potentially rare things that info screen in the system map can be very useful indeed. Of course, the only way to find out exactly what types of exobiology is there is to go and map it, but at least now you'll only need to map bodies that you know have signals. :)
 
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