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Hey,

For the background of my regiments, I have encountered several small problems with the fluff.

In a part of the fluff from my homeworld, there is a Tyranid invasion.
The planet lies near the eastern border of the Segentum Solar.
However, is it possible? (Wouldn't the majority of the Imperium have suffered if the Tyranids striked this deep?)

The Bataviran regiments always contain 2 companies from the Thurrovian factory world and 2 companies from the Ardennian mining colony.
Could these companies be divided among the Bataviran company because of their special abilities?
(Example: The Adrennians excell at digging trenches, instead of making two companies that excell at this, they split them into smaller groups and dived them among the Bataviran companies.)

As last: Batavira is an agri-world, these planets usually contain between 15.000 and 1.000.000 people.
I wanted to make my planet contain 40.000.000 people. (Just because of the sheer size of this planet)
Possible or not?

all of those things are possible

Tyranid splinter fleets are ranging far and wide throughout the imperium, and the nids are being attracted to the astronomicon, so they can go as deep or as far as you want.

The imperial guard has innumerable forms or organizational structure and such, so really you can do whatever you want with guard regiments.

As to the population of an agri planet due to size would be gravity. I would think maybe it could be subterranean as well as surface dwelling, thereby doubling living area, could have hive stacks on an agri world, some freak thing that would lessen the gravity, or the people deal with the gravity in some fashion. We are talking gravity several times earth where a human would not be able to survive...

Hivefleet leviathan would be your best bet for producing a splinter fleet near the segmentum solar.

The tyrandids are just everywhere. I'd like to see what happens when they hit Sol.

The idea about Bataviran is an artic planet where the people survive in gigantic domes. Inside these domes people produce food in order to survive.
Which could be by growing crops or tending cows.

how can it be an agri-world if they only make enough to survive? argi-worlds are worlds that export foodstuffs.

The Tyranid are coming at Earth from below the galactic plane. They don't need to carve their way through the entire galaxy to get to Segmentum Solar.

I love the idea of an Underground Ice Cow! You should model one up for an objective!

Allright, my love of Ice Cows aside, I concur with all of the other posters that everything you want to do fluff-wise is possible. Have you started working on the army at all, or are you still in the planning stages?

Apart from the nercons (who already did it ) the tryanids are the mostly likely to get to the segentum solar.
Also if you want a planet to be huge you have the said problem of gavity but when did 40k have the fact in it?

oldone wrote:Apart from the nercons (who already did it ) the tryanids are the mostly likely to get to the segentum solar.
Also if you want a planet to be huge you have the said problem of gavity but when did 40k have the fact in it?

Gravity still exists.
Also Horus also managed to get to Terra.

oldone wrote:y but when did 40k have the fact in it?

Ogryns

BluntmanDC wrote:

oldone wrote:y but when did 40k have the fact in it?

Ogryns

I think what Bluntman means is that humans have evolved slightly to adapt to a changed environment for example Ogryns which have adapted to a high gravity environment, which could be the answer for the OP. You could use a mix of Catachan and Cadian bits to represent the increased muscle mass the inhabitants would have due to living in a high gravity environment.
Or he could mean something else i don't know.

I think some people need to check their physics textbooks again. The physical size of a plane does not equate to higher gravity. Saturn and Neptune have only slightly higher gravities compared to earth (1.13-1.14 times that of earth) despite being 9x and 3x (respectively) the diameter of earth. So yes, you could have a planet 10x the size of the earth with the same gravity (provided the mass of the planet was not significantly large).

In fact, one of the extrasolar planets believed to be capable of sustaining life is about 4x larger than earth but has a very similar gravitational pull, calculated to be slightly lower IIRC.

chaos0xomega wrote:I think some people need to check their physics textbooks again. The physical size of a plane does not equate to higher gravity. Saturn and Neptune have only slightly higher gravities compared to earth (1.13-1.14 times that of earth) despite being 9x and 3x (respectively) the diameter of earth. So yes, you could have a planet 10x the size of the earth with the same gravity (provided the mass of the planet was not significantly large).

In fact, one of the extrasolar planets believed to be capable of sustaining life is about 4x larger than earth but has a very similar gravitational pull, calculated to be slightly lower IIRC.

I think people realise that and are taking it as a given that it is made from the same stuff Earth is and with a mass relative to it's size accordingly.

It could be made of the same stuff as Earth, but its mass need not be relative to it's size. If it has a lot of very large, deep running caves, and a greater proportion of the lighter materials/smaller core, etc. it could very well be a much larger earthlike planet with a similar gravity.

chaos0xomega wrote:It could be made of the same stuff as Earth, but its mass need not be relative to it's size. If it has a lot of very large, deep running caves, and a greater proportion of the lighter materials/smaller core, etc. it could very well be a much larger earthlike planet with a similar gravity.

That is probably a better solution for the OP's fluff.
Still, i wouldn't do it pueley because i wouldn't be able to get the name Planet Pillow out of my head.

purplefood wrote:

BluntmanDC wrote:

oldone wrote:y but when did 40k have the fact in it?

Ogryns

I think what Bluntman means is that humans have evolved slightly to adapt to a changed environment for example Ogryns which have adapted to a high gravity environment, which could be the answer for the OP. You could use a mix of Catachan and Cadian bits to represent the increased muscle mass the inhabitants would have due to living in a high gravity environment.
Or he could mean something else i don't know.

Thats pretty much was what i ment, GW has taken gravity into account in some way

chaos0xomega wrote:I think some people need to check their physics textbooks again. The physical size of a plane does not equate to higher gravity. Saturn and Neptune have only slightly higher gravities compared to earth (1.13-1.14 times that of earth) despite being 9x and 3x (respectively) the diameter of earth. So yes, you could have a planet 10x the size of the earth with the same gravity (provided the mass of the planet was not significantly large).

In fact, one of the extrasolar planets believed to be capable of sustaining life is about 4x larger than earth but has a very similar gravitational pull, calculated to be slightly lower IIRC.

Can you build a city on Saturn, no ITS MADE OF MOSTLY GAS. the world would have to be of similar density as Earth to support cities, it would have to be even more dense if it had caverns, otherwise the caverns would collapse under the wait of the materials needed to make a city and support human life. With a similar density and an increase in size of the planet, it would have greater gravitational effect.

Changed the population to 15.000.000.

BluntmanDC wrote:how can it be an agri-world if they only make enough to survive? argi-worlds are worlds that export foodstuffs.

The planet needs a reason to be important to the Imperium. Thus these people produce crops in order to survive ---> to have any interest. Why would the Imperium otherwise bother to colonise a planet?

MegaDave wrote:I love the idea of an Underground Ice Cow! You should model one up for an objective!

Cows are part of the fluff, which can be found here. http://www.dakkadakka.com/dakkaforum/posts/list/331115.page
I am also toying with the idea of making cows as Rough riders..

oldone wrote:Apart from the nercons (who already did it ) the tryanids are the mostly likely to get to the segentum solar.
Also if you want a planet to be huge you have the said problem of gavity but when did 40k have the fact in it?

I asked this so that no one would go insane about some little mistakes. Did 40k ever notice rotation speed? (The sound a planet mades when it's turning.)
We as humans don't hear it, because we are acustomed to it. However if you stand upon another earth-like planet with a rotation speed slightly lower or higher, you would keep hearing the sound.

purplefood wrote:

BluntmanDC wrote:

oldone wrote:y but when did 40k have the fact in it?

Ogryns

I think what Bluntman means is that humans have evolved slightly to adapt to a changed environment for example Ogryns which have adapted to a high gravity environment, which could be the answer for the OP. You could use a mix of Catachan and Cadian bits to represent the increased muscle mass the inhabitants would have due to living in a high gravity environment.
Or he could mean something else i don't know.

The main question was: Is it possible to have a large argi planet with a population of 40.000.000

purplefood wrote:

chaos0xomega wrote:It could be made of the same stuff as Earth, but its mass need not be relative to it's size. If it has a lot of very large, deep running caves, and a greater proportion of the lighter materials/smaller core, etc. it could very well be a much larger earthlike planet with a similar gravity.

That is probably a better solution for the OP's fluff.
Still, i wouldn't do it pueley because i wouldn't be able to get the name Planet Pillow out of my head.

I will keep planet Pillow in mind if I ever start a new guard regiment...

Ok it is possible for an agri world to have a largepopulation. Very large as it seems to be. Maybe they lve in underground cities and harvest the entire surface for food or live in floating town (Lots of little ones) and herd space cows or something.

loner wrote:

BluntmanDC wrote:how can it be an agri-world if they only make enough to survive? argi-worlds are worlds that export foodstuffs.

The planet needs a reason to be important to the Imperium. Thus these people produce crops in order to survive ---> to have any interest. Why would the Imperium otherwise bother to colonise a planet?

its just that why would the IoM colonise an ice world to use as an agri world, to be an agri world it has to produce more than it uses which would be hard on an ice world

BluntmanDC wrote:

loner wrote:

BluntmanDC wrote:how can it be an agri-world if they only make enough to survive? argi-worlds are worlds that export foodstuffs.

The planet needs a reason to be important to the Imperium. Thus these people produce crops in order to survive ---> to have any interest. Why would the Imperium otherwise bother to colonise a planet?

its just that why would the IoM colonise an ice world to use as an agri world, to be an agri world it has to produce more than it uses which would be hard on an ice world

Where did he say it was an ice world?

BluntmanDC wrote:

Can you build a city on Saturn, no ITS MADE OF MOSTLY GAS. the world would have to be of similar density as Earth to support cities, it would have to be even more dense if it had caverns, otherwise the caverns would collapse under the wait of the materials needed to make a city and support human life. With a similar density and an increase in size of the planet, it would have greater gravitational effect.

Thats totally untrue, the weight thing not the saturn thing(athough you could theoretically build a city on Saturn (a floating city). In fact, if you read Nemesis, there ARE cities on Saturn in WH40k). There are numerous cities that are built on top of artificial or natural cave systems, some of which are VERY extensive and run very deep. You could very easily have a viable planet made of earthen materials. The crust layer would have to be much thicker (and of course filled with caves), with much thinner core and mantle layers. In the end, gravity is G(m/r) where G is the universal gravitational constant, m is the mass of the planet, and are is the distance from the center of mass (the center of a planet) to its surface (sea level). It's science fiction, its not hard to find a way to make it work.

chaos0xomega wrote:

BluntmanDC wrote:

Can you build a city on Saturn, no ITS MADE OF MOSTLY GAS. the world would have to be of similar density as Earth to support cities, it would have to be even more dense if it had caverns, otherwise the caverns would collapse under the wait of the materials needed to make a city and support human life. With a similar density and an increase in size of the planet, it would have greater gravitational effect.

Thats totally untrue, the weight thing not the saturn thing(athough you could theoretically build a city on Saturn (a floating city). In fact, if you read Nemesis, there ARE cities on Saturn in WH40k). There are numerous cities that are built on top of artificial or natural cave systems, some of which are VERY extensive and run very deep. You could very easily have a viable planet made of earthen materials. The crust layer would have to be much thicker (and of course filled with caves), with much thinner core and mantle layers. In the end, gravity is G(m/r) where G is the universal gravitational constant, m is the mass of the planet, and are is the distance from the center of mass (the center of a planet) to its surface (sea level). It's science fiction, its not hard to find a way to make it work.

There you go then. Question answered.
It is in fact possible for a planet to be used as an Agri-world whilst retaining a large population.

But the OP said something about living in agro-domes and farming within them? I think that might have to be changed, unless farming underground is viable.

blazinpsycho&typhooni wrote:But the OP said something about living in agro-domes and farming within them? I think that might have to be changed, unless farming underground is viable.

Funny thing that. It is apparently.
My example being Calth (Ultramarine world) where the Word Bearers did something funny to the sun and the planet is dangerously radioactive on the surface but the people live in caves where they grow stuff. Like grapes.

I meant as if they had the means to, but I guess you're right. Plus if the planet were large and porous, think about all the space for farming!

Also, having a less dense core, meaning lower gravity similar to earth's, would the planet's gravitational field/well be smaller? Would that allow ships to warpjump closer to the planet?

hrm... underground space cows?

blazinpsycho&typhooni wrote:I meant as if they had the means to, but I guess you're right. Plus if the planet were large and porous, think about all the space for farming!

Also, having a less dense core, meaning lower gravity similar to earth's, would the planet's gravitational field/well be smaller? Would that allow ships to warpjump closer to the planet?

hrm... underground space cows?

I not only have little to no understanding of physics but no understanding of how the hell a warp thingy works.
Someone else might be able to help better.

purplefood wrote:

blazinpsycho&typhooni wrote:I meant as if they had the means to, but I guess you're right. Plus if the planet were large and porous, think about all the space for farming!

Also, having a less dense core, meaning lower gravity similar to earth's, would the planet's gravitational field/well be smaller? Would that allow ships to warpjump closer to the planet?

hrm... underground space cows?

I not only have little to no understanding of physics but no understanding of how the hell a warp thingy works.
Someone else might be able to help better.

The warp jump thing sounds interesting, perhaps a little more information?
Also: Servo skullls, can they be used as beekeepers?
The idea is that because the servo skulls are smaller and they cannot be stung they are prefered for domisticating bees.
Or perhaps used on the battle field as lightbearers? Or as part of the administratum, keeping track of the entire battle first hand?
(Don't know why they would bother, but I noticed that thing upon the Command squad sprue...)

As I recall, I think it was in a crimson fists novel/story. Orks have come to assault their world. They have a day or so before the orks come because they have to jump outside the (either planet's or system's) gravity well or risky being torn apart by the gravity when they warp in. So the imperial ships set up a perimieter at where they believe the orks will jump in.

Big surprise though. Orks dont really give a damn about the laws of gravity. They jump in above the planet, tearing apart hundreds of their ships raining wreckage onto the planet. Imps have to trek back to planet and try and save them.

I think it has to do with the pull of gravity and the warp or something. A planet's gravity is pretty strong

I also believe that gravity wells have been used in other games, mainly sins of a solar empire. You can only jump into a planets outer rim of the gravity well, and jumping out can only occur at the outer rim.

afaik compared to other forces gravity is pretty damn weak.
anywho Mr.Psycho&Typhoon is right you can't jump in too close to a planet maybe it has something to do with sudden strees on a ships hull maybe not.