Orbiter Forum Planetary System

[donatelo200]

We could make the star like an F2V and put my planet's orbital inclantion almost vertical to limit contact with other planets.

 

[fireballs619]

This link contains some nice formula we can use, specifically finding habitable zones, brightness, etc etc. Look under the section called 'the sun'. This link will no doubt prove useful later on too.

 

[T.Neo]

As far as life goes, I think the "habitable zone" stuff is garbage. The habitable zone is for life as we know it. I personally think that every planet we create could have the potential for life. As long as the life giving substance is water across the board, we should be good. Let people's imagination run free.

The habitable zone is pretty much the "liquid water zone". You might be able to go further from the star and still have liquid water, if you have a thick atmosphere of greenhouse gases or are close to a brown dwarf radiating heat, but there are a certain set of parameters that are needed for water to be liquid on the surface. Conversely you can be in the habitable zone and not have liquid surface water, like the Moon, Venus or Mars. Venus is simply too hot, the Moon geologically dead and airless, and Mars too thin-aired and cold.

By building a planet, do you mean "that's no moon"? Or like the Magratheans?

How about an artificial planet, as a shell (supported in the same manner as a lofstrom loop) around an artificial black hole?

Or a habitable asteroid, with an artificial source of gravity?

Let's take phobos as an example. By adding a black hole of 1.77892e+16 tons in mass to the exact center (and keeping it there by some means, a charged black hole can be used for this), you will get around 1 G of gravity on the surface. Such a black hole would have a luminosity of only 0.000001126048 watts and a lifetime of 1.499771e+34 years.

Now, the problem is that the asteroid might not be able to hold up under this gravity (expecially if it's a rubble pile). Add to that the potential problems of keeping an atmosphere around the asteroid, where the oceans would go, gravity gradients etc.

Oh, and the tiny little problem of artificially creating a black hole. I suppose there is always the possibility of building a supraplanetary shell around a gas giant in a similar fashion to the "artificial planet".

IMHO, we absolutely need a closely Earth-like planet somewhere in the system, because otherwise our existing atmospheric vessels wouldn't function. No XR2 = BAD.

Vessels like the XR2 will still function on planets with sufficient atmospheres, those atmospheres don't have to be breathable to humans.

Though using SCRAMs or opening the doors to get a bit of fresh air wouldn't be exactly ethical...

I suggest a G, or at least a K star for life. I feel an F class star is potentially too shortlived or blue. At least we know G stars, and it isn't as cold and dim as an M star...

 

[River Crab]

We could make the star like an F2V and put my planet's orbital inclantion almost vertical to limit contact with other planets.

Hmm...I don't really like the idea of such different inclinations...not only is it inconsistent with the way systems form, it's also probably really, really hard to get to...
Is there another way we could allow an Earthlike and this planet to coexist, and still be accessible? I don't want to shoot down what seems like an interesting planet-moon system.

 

[T.Neo]

Is there another way we could allow an Earthlike and this planet to coexist, and still be accessible? I don't want to shoot down what seems like an interesting planet-moon system.

Put the periapsis of the planet out at 30 AU.

You'll probably still have stability problems with the other planets. Star systems are finicky things, often they have to be balanced just right or they'll fall apart.

 

[donatelo200]

What if my planet was captured. No matter how unlikely anythings possible. Also T.neo the Ups And system is 3.3 Billion years old and it has an F star at it's center.

 

[T.Neo]

That might be a good enough handwave for why it's there, but it doesn't explain away the stability problem.

It would cause utter havoc with the other planets in the system.

 

[donatelo200]

A high inclanation could limit the pertbations (how do u spell that) but another problem. As it was being captured wouldn't that cause havok? (but eventually things would calm down after several planets were ejected)

 

[River Crab]

The habitable zone is pretty much the "liquid water zone". You might be able to go further from the star and still have liquid water, if you have a thick atmosphere of greenhouse gases or are close to a brown dwarf radiating heat, but there are a certain set of parameters that are needed for water to be liquid on the surface. Conversely you can be in the habitable zone and not have liquid surface water, like the Moon, Venus or Mars. Venus is simply too hot, the Moon geologically dead and airless, and Mars too thin-aired and cold.



How about an artificial planet, as a shell (supported in the same manner as a lofstrom loop) around an artificial black hole?

Or a habitable asteroid, with an artificial source of gravity?

Let's take phobos as an example. By adding a black hole of 1.77892e+16 tons in mass to the exact center (and keeping it there by some means, a charged black hole can be used for this), you will get around 1 G of gravity on the surface. Such a black hole would have a luminosity of only 0.000001126048 watts and a lifetime of 1.499771e+34 years.

Now, the problem is that the asteroid might not be able to hold up under this gravity (expecially if it's a rubble pile). Add to that the potential problems of keeping an atmosphere around the asteroid, where the oceans would go, gravity gradients etc.

Oh, and the tiny little problem of artificially creating a black hole. I suppose there is always the possibility of building a supraplanetary shell around a gas giant in a similar fashion to the "artificial planet".



Vessels like the XR2 will still function on planets with sufficient atmospheres, those atmospheres don't have to be breathable to humans.

Though using SCRAMs or opening the doors to get a bit of fresh air wouldn't be exactly ethical...

I suggest a G, or at least a K star for life. I feel an F class star is potentially too shortlived or blue. At least we know G stars, and it isn't as cold and dim as an M star...

Like a Dyson sphere? There's a challenge. Personally I'd stay away from God-Modding Phobos.

My reason for the Earthlike planet was as a sort of legacy planet for addons, and a familiar place to start for Orbinauts new to this system. If we want other people to use this system, we have to make it attractive to begin exploring and getting used to. We need a human-compatible, airbreather-friendly, accessible planet.

And an XR2 without SCRAM engines is not an XR2. You can use SCRAMs on Venus, but that just ain't right! I don't call that functioning. Also, a very different atmosphere will probably completely destroy the G42 Starliner's propulsion. Stuff like that. Think of all the addons you might be stepping on, if you leave out an Earth!

BTW, is it possible to have non-human UMMUs? Like, they die if they breathe Earth's atmosphere, but they can survive on their home planet, where humans cannot?
Probably not, actually. Oh well.

EDIT: oh wow this thread is rolling. I missed 3 posts!
As for that gas giant, I think that the only solution is to lower its mass or lower its eccentricity. It seems it would really mess things up for other people's planets, and would be a pain when trying to plan a trip.
Besides, I think gas giants are dependent on the formation of stars. A captured gas giant just seems too far-fetched for the system's believability.

 

[donatelo200]

You could creat an alien mesh. Although it will be able to breath our atmosphere.

 

[astrosammy]

Maybe try Flexify 2, in my link above? From the looks of it, it can input any kind of projection and output any other kind of projection. Either way it sounds useful; just look at what they did to their little local map.

How stupid is that? I googled and googled but never thought of that one! Thank you, I'll try it!

 

[T.Neo]

You can create an alien mesh, but as donatelo200 said, it'd still breathe our atmosphere. It'd also have the same PMI, mass, etc as a human (unless you're going for a ridiculously human alien). Not that breathing an atmosphere similar to our own is that bad an idea...

I tend to agree with the Earth-like planet, but I think it should have it's own quirks, and slight differences from Earth. Like how Mercury isn't really the Moon, or Saturn isn't really Jupiter.

 

[donatelo200]

How about a mass of 0.712 Jupiters? with an eccetricy of 0.72 and an inclanation of 0.84. It's captured not native to the system.

 

[T.Neo]

It's still going to cause trouble. Even an Earth mass planet in that orbit is going to cause trouble.

Unless this planet is orbiting far outside the rest of the system. But then you run into simulation stability problems at apogee, etc.

It may also be interesting to consider other, artificial structures in the system. Like O'neill cylinders or Halo-type orbital rings.

Not sure how possible the latter would be in Orbiter.

 

[donatelo200]

Ok different. 12.33 jupiter masses 0.124 eccetricy. With this mass it can hold many more high mass moons. So we could have several living moons and a planet in a trojan point. Almost forgot my inhabited moon will be 0.946 Earth masses with and atmospheric pres of 0.874 Earth Atmos.

P.S. atmo press on a gass giant is 304.2 Gpa

 

[Kaito]

I say we create the planets now and worry about making them all fit later

Capital city of BuImen is half-destroyed: http://s106.photobucket.com/albums/m267/Kaito_06/?action=view&current=BuImenTorn3.jpg

After it's completely destroyed, i'll enhance it in GIMP, then work on the creation picture of the "Great River"

 

[donatelo200]

Ok i'll creat the star and and my planet and moon. Could you put that capital on my moon. It has night lights and the city sounds like it would work well with my moon. The star will be an F8V. It will have a life of roughly 6.0 Billion Years.

 

[Kaito]

Ok i'll creat the star and and my planet and moon. Could you put that capital on my moon. It has night lights and the city sounds like it would work well with my moon.

Heh, sorry, but that capital is specifically tailored for one of my continents. I can (attempt) to draw one for you though

 

[donatelo200]

Heh, sorry, but that capital is specifically tailored for one of my continents. I can (attempt) to draw one for you though

Ok will you need the map? I Have the map. I also have the night map. The inteligens here is peacful they are in a long period of peace.

 

[fireballs619]

I say we create the planets now and worry about making them all fit later

Capital city of BuImen is half-destroyed: http://s106.photobucket.com/albums/m267/Kaito_06/?action=view&current=BuImenTorn3.jpg

After it's completely destroyed, i'll enhance it in GIMP, then work on the creation picture of the "Great River"

You should put some smoke rising up from the buildings in there- It would give it a nice effect.