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Forum » SpaceEngine » Feedback and Suggestions » Habitable zone, orbits and so on
Habitable zone, orbits and so on
apenpaapDate: Monday, 09.07.2012, 14:31 | Message # 16
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Yeah, you're right, there's not much point to oceaniaforming Europa, really.




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scavengerDate: Wednesday, 26.09.2012, 14:22 | Message # 17
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[The threads have been merged]

hi

great job
i'm new on it and had some issues with the fatal "Error disposing memory" but thanks to all the posts about it, i could handle it smile

now i'm wondering about how you receive or prepare new ideas on this project. Example :
for all stars with planets around, can you add a button or something to enable to show a green zone describing the "life zone area" ?

i guess that could halp for those who wanna edit their life planets

thkx
 
smjjamesDate: Wednesday, 26.09.2012, 14:54 | Message # 18
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Not sure what you meant by a flare, but yeah, I agree that having an overlay for the star's (or stars in the case of binary and up multiple systems) habitable zone would be cool.




 
SpaceEngineerDate: Wednesday, 26.09.2012, 14:58 | Message # 19
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Today the habitable zone is being used less more, because people realized that the temperature on the planet depends not only on solar illumination, but the planet's atmosphere, albedo, greenhouse effect, and many other effects. Even Europa may have life under ice crust - and this life doesn't depend on the Sun's light.

*





 
smjjamesDate: Wednesday, 26.09.2012, 15:01 | Message # 20
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True, but knowing where the habitable zone is would still be cool.




 
HarbingerDawnDate: Wednesday, 26.09.2012, 15:07 | Message # 21
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Quote (smjjames)
True, but knowing where the habitable zone is would still be cool.

But determining the habitable zone depends on what range characteristics a planet needs to have in order to be considered "habitable". As our understanding of planetary science has increased, so has the range of the habitable zone, which in our planetary system stretches from Venus to beyond Mars. Yet obviously Venus and Mars are not very hospitable, so the habitable zone in this case does not tell us much, only that somewhere in that range could be planets with liquid surface water. It becomes even more difficult to calculate for systems with more than one sun.





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WatsisnameDate: Wednesday, 26.09.2012, 15:35 | Message # 22
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With tidal heating, it could be possible to have life even on moons of rogue gas giants that have no sun. They might even be common in our galaxy, as rogue planets are estimated to vastly outnumber stars. smile

In my opinion 'habitable zone' these days should pretty much just mean 'habitable for humans', meaning an earth-like planet with similar albedo and atmospheric chemistry would have an equilibrium temperature that is tolerable for humans if it is within that range of the star. Then again, greenhouse gas concentrations add another layer of complexity to that, so...







Edited by Watsisname - Wednesday, 26.09.2012, 15:41
 
scavengerDate: Wednesday, 26.09.2012, 23:40 | Message # 23
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well, uh.... i meant intelligent life...
meaning that the planet should be in a zone that don't influence threat too much the ecosystem.
Europa MAY have life under the ice, but if you consider amoebas and worms as the final forms of life a planet can only have, then for sure the green zone i'm speaking of is none of interest ^^

to have intelligent forms of life, there must be a kind of protection against space radiations & that sort of things, ie electromagnetic field: this field cannot exist on a planet too far from it's sun because the kernel is cooled. On Europa your life is stuck under the ice, ie it's only underwater life.
It cannot be intelligent because that life doesn't have to face changes in climate, and live in only one type of ecosystem : water. We on earth know about air & water, storms, fire, heat & cold, ice too, well i mean the life on earth had to adapt to different ecosystems, then could evolve, protected from dangerous space radiation by the earth field, and thanks to the sun's proximity, didn't had to face too different harmful climates.

On europa you have only 2 climates in one ecosystem : cold water, warm water. life if it exists will never evoluate to intelligence.

the green zone i'm talking about depends only on the star size, mass & power. ie this zone is different on stars with same mass & size but different steps of their live : blue, white, yellow, red giant...

but i can understand about the difficulties to represent it : when the planets are not all aligned on a single disk as an example. I dunno the astronomical term but one which is rotating around its sun at a 80° difference from all the others may be in the green zone, but how could one represent it ?

well, it was just an idea smile
 
WatsisnameDate: Thursday, 27.09.2012, 00:14 | Message # 24
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Quote (scavenger)
On europa you have only 2 climates in one ecosystem : cold water, warm water. life if it exists will never evoluate to intelligence.


How are you defining intelligence here? Also I'm not sure if we understand enough on astrobiology and the evolution of intelligence to be able to claim that with very much confidence. There are some incredibly diverse ecosystems living off of thermal vents at the bottom of Earth's oceans.

Quote (scavenger)
when the planets are not all aligned on a single disk as an example. I dunno the astronomical term but one which is rotating around its sun at a 80° difference from all the others may be in the green zone, but how could one represent it ?


Er, what you're describing is orbital inclination, or how tilted the planet's orbit is relative to the plane of the solar system. I don't think that should matter for how habitable a planet is though, since that does not affect the planet's distance from the star. If you consider the possibility of planets across all possible inclinations, then the habitable zone would technically be a spherical shell. Earth's orbit could be tilted vertically at 90°, or even be retrograde at 180°, and still be totally habitable. Also I think planets tend to have relatively low inclinations anyway -- a natural result of the processes of solar system formation.

You might be thinking of either eccentricity (which is how non-circular the orbit is), or the obliquity of the rotation axis. These will both affect the temperature variations on the planet.





 
scavengerDate: Thursday, 27.09.2012, 10:35 | Message # 25
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Quote (Watsisname)
then the habitable zone would technically be a spherical shell.


yes exactly. hard to code i guess ^^

how about a green halo around the planets INside the boxes of the planets list up left ?
well there is already the temperature indication : warm, hot, temperate... i like colorization a lot more smile it could be just a little option somewhere


Edited by scavenger - Thursday, 27.09.2012, 10:39
 
SolarisDate: Thursday, 27.09.2012, 21:52 | Message # 26
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scavenger, an appropriate place to discuss about habitable zone would have been in this thread. In the future, please try not to create new threads unless there is no other appropriate place for your post.

Thanks!
 
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