Planets/Moons types

kandiser
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Re: Planets/Moons types

Postby kandiser » Fri Apr 03, 2015 6:31 pm

That is very great! I like that! 8-)
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VoodooDog
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Re: Planets/Moons types

Postby VoodooDog » Fri Oct 02, 2015 7:06 pm

in fact, there can be no gas moons, ever.
hopefully u will change this guys. moons also cant have a nice thick atmosphere like our cosy earth.

pls keep that in mind instead of toying with all the numbers randomly.

Calavero
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Re: Planets/Moons types

Postby Calavero » Fri Oct 02, 2015 7:45 pm

VoodooDog wrote:in fact, there can be no gas moons, ever.

Why? if there is heavy moon core which can create stron gravity field... theoretically it's possible to create gas moons.

VoodooDog wrote:pls keep that in mind instead of toying with all the numbers randomly.

Anyway... right now our star system generation is fully random. If you convince me that there can't be gas moons.. we will include this in "real star system" generation process.
We plan to have this option in future DLC. For example near star there will be hotter planets, and away from star colder etc. But it will be additional option in DLC.
M.O.R.E. under construction

VoodooDog
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Re: Planets/Moons types

Postby VoodooDog » Sat Oct 03, 2015 12:33 am

okay, lemme try to convince you with 3 arguements:

1)
i think u imagine something like a small metal ball with some gas around it orbiting a huge planet
this wont happen because he will lose all the gas to the planet he is orbiting
https://en.wikipedia.org/wiki/Roche_limit

2)
The main reason we don’t get gas moons is that they are simply not big enough. Gas is very volatile, it has a high degree of movement, and this makes it easy for gas to escape. This happens on all the bodies in the solar system that have gas in the atmosphere. Although the rate at which they lose gas tends to be very small. This high movement rate means that objects have to reach a certain size before they are able to hold on to an atmosphere. Most moons don’t reach this minimum size limit.
As the moons are small their gravitational influence usually cannot rival that of their parent planets. This means that the planet usually strips any gas away from the moons around it.

A gas moon, in the style of a gas planet could not exist. The closest you could possibly get would be a binary planet system, where roughly similar size gas planets orbited each other. As of yet, we haven’t found anything like this, but as the search continue, maybe we will.


Mars for example has 1/3 of earths atmosphere density and will never be able to get a bigger, more dense one due to his lack of mass.

3)
smallest gas objects:
gas dwarf planets with rocky cores and hydrogen–helium envelopes (radii between 1.7 and 3.9 Earth radii)

page 1
http://arxiv.org/ftp/arxiv/papers/1405/1405.7695.pdf

Calavero
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Re: Planets/Moons types

Postby Calavero » Sat Oct 03, 2015 9:09 am

Ok.. so there can't be small gas planets or gas moons - ok.
I think we can create gas moons size 5 (huge moon, something almost like medium planet ) and planets size 3,4,5 (medium, large, huge).

Anyway... it can be implemented when we'll be creating real world generation algorithms.
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