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Forum » SpaceEngine » Feedback and Suggestions » Impossible planets (Collection of physically impossible planets)
Impossible planets
36ophiuchiDate: Sunday, 07.06.2015, 18:42 | Message # 1
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In this thread I'd like to collect physically unsound/impossible planets and moons people have encountered in Space Engine. Please feel free to add your sightings.

I am using the 9.7.4beta.

Body "TET Car 4"
Oceania
atm. pressure = 166 atm (at sea level)
temperature = 616°C (at sea level)

The boiling point of water at 166 atm is at ~300°C (corrected value). No known additive could bring it up to over 600°C. IF the displayed ocean is not water, but supposed to be some exotic liquid like tin or sulfur, it should definitely not be blue (and not be classified as "oceania"?).


Edited by 36ophiuchi - Monday, 08.06.2015, 00:06
 
MargDate: Sunday, 07.06.2015, 20:34 | Message # 2
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i actually noticed in 0.9.7.3
1) planets with big satellites (50% of parent's body diameter) fairly close to them. I did not see it in version 0.9.7.1. Are such bodies really out of Roche zone?? I does not look normal.
Example - RS 3724-2303-6-63202-124 3.1
2) jovian planets may have up to 5 satellites bigger than Earth, it happened several times, I think it is too much.
I also did not observe this in 0.9.7.1
Example - RS 3724-2299-5-15321-220 8


Edited by Marg - Sunday, 07.06.2015, 21:05
 
WatsisnameDate: Sunday, 07.06.2015, 21:27 | Message # 3
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Quote 36ophiuchi ()
The boiling point of water at 166 atm is at ~190°C


More like 300°C if this phase diagram is correct. Still much lower than this planet's average temperature of course.

Added: However, remember this is pressure at some defined reference altitude. Pressure increases with depth, so with an oceania, you will still easily reach sufficient depth for liquid (or even solid!) water to exist. Put another way, if you take a temperate oceania and raise its temperature above the boiling point, the entire planet will not necessarily turn into vapor.





 
36ophiuchiDate: Monday, 08.06.2015, 00:04 | Message # 4
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Quote Watsisname ()
More like 300°C if this phase diagram is correct. Still much lower than this planet's average temperature of course.

Added: However, remember this is pressure at some defined reference altitude. Pressure increases with depth, so with an oceania, you will still easily reach sufficient depth for liquid (or even solid!) water to exist. Put another way, if you take a temperate oceania and raise its temperature above the boiling point, the entire planet will not necessarily turn into vapor.


Of course, you are correct. My bad. But as you said, still way below the planet's temperature, which, along with the mentioned atmospheric pressure is normalized to "sea level", i.e., the altitude at which the water table is displayed. Ergo, Space Engine tells me 166 atm @ 616°C and I am hovering right above the water...
 
HarbingerDawnDate: Monday, 08.06.2015, 00:29 | Message # 5
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36ophiuchi, read the FAQ, it addresses your issue about the oceania specifically.




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Donatelo200Date: Monday, 08.06.2015, 00:30 | Message # 6
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Consider it just the point where the atmosphere becomes dominated by water vapor. There would be no true division of liquid water and gaseous water at these temperatures. GJ 1214 b is a good example of a real life hot ocean planet. wink




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AerospacefagDate: Monday, 08.06.2015, 20:39 | Message # 7
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HarbingerDawn, by the way, if you are talking about main FAQ on the websiete, at least one problen there can be removed - ships in interstellar space.

http://en.spaceengine.org/index/faq/0-29
 
36ophiuchiDate: Monday, 08.06.2015, 21:19 | Message # 8
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Quote Donatelo200 ()
Consider it just the point where the atmosphere becomes dominated by water vapor. There would be no true division of liquid water and gaseous water at these temperatures. GJ 1214 b is a good example of a real life hot ocean planet.


Well, in this case it is misleading to have a discrete water surface displayed wink
 
HarbingerDawnDate: Tuesday, 09.06.2015, 04:46 | Message # 9
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Quote Aerospacefag ()
at least one problen there can be removed - ships in interstellar space.

Yes, after 0.9.7.4 is finished and officially released.





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IdgeliosDate: Thursday, 02.07.2015, 18:08 | Message # 10
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I've encountered titans that are way too cold to possibly exist on multiple occasions. Mainly since at 40 K even liquid nitrogen freezes. Perhaps a oversight that will be corrected if support for liquid temperature ranges is added in a non-palette based fashion (i.e going off of temperature instead of a probability range in temperature categories).

It's a nitpick, I know, but it's something that actually bothers the hell out of me. I believe that Space Engineer is already intending to overhaul the planet generation if the planet classification thread is anything to go by so this may become a non-issue in the near future.
 
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