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Been looking for more info about the rest of the Sol system, besides Terra and Mars.

Terra and Mars are already quite straightforward: Terra is the capital/home world of the Imperium whilst Mars is the capital world of the Mechanicum. Yes, I see them as separate entities since the Mechanicum is allied to the Imperium, not an assimilated component.

So here are the planets and moons. I'll hope to update the first post with new (sourced) info whenever you guys post it.

I hope you guys can help me out filling this in further. I need to make the text look nicer, which I'll do when I have more time and more stuff to add. If you do come with more info, please, also state where you got it from, so we know it's official! Posted Image

Thank you! Posted Image

===================================



Mercury
[nothing yet]


Venus
In Reflection Crack'd Fulgrim remembers a story of a warrior trapped in an invisible maze in the Erycinian Highlands of Venus...


Terra
Pretty straight forward...it deserves a separate thread though, once that thread has been made, a link to it will be added here.

Luna
Originally ruled by Gene-cults, the Emperor sent the VII Legion, XIII Legion, and XVI Legion to conquer it. This battle, known as the "First Pacification of Luna", defined the XVI Legion, earning them the name Luna Wolves.


Mars
Pretty straight forward...it deserves a separate thread though, once that thread has been made, a link to it will be added here.

Deimos
Apparently it served as a Forge World, according to the Grey Knights Codex, it was during the Horus Heresy that Malcador "relocated" the moon to Titan so it could provide the hardware for the Grey Knights. Ok...

Phobos
It is known for raising regiments for the Imperial Guard later on, such as the "Phobos 16th Regiment", at least according to the background book "The 13th Black Crusade". No other info out there.


Asteroid belt
[no info yet]


Ceres
[no info yet]


Jupiter
Colonized by humans during the Age of Terra, but got conquered by cruel Xenos overlords (according to the FW book Betrayal). Later on Jupiter would serve as Terra's shipyard (according to Nemesis).

Ananke
According to Nemesis this moon is known to have had habitats on its surface by the era of the Horus Heresy.

Iocaste
According to Nemesis this moon is known to have had habitats on its surface by the era of the Horus Heresy.

Europa
According to Nemesis Europa had been geo-engineered into an ocean-moon by the Horus Heresy.

Io
[no info yet]

Ganymede
Basically a giant shipyard, but would fall to a disaster known as the "Contagion of Ganymede". The Adeptus Mechanicus when they began experiments in warp-core technology used by the Squats (in the retcon this would then either be Dark Age tech or maybe even Xenos or Chaos). As a result of this incident, the Technomagi of the Adeptus Mechanicus gave up their experiments in studying this technology. (source: Codex Imperialis)

Thule
According to Nemesis this is an asteroid moon that served as the clandestine shipyard for the Furious Abyss and was destroyed by renegade members of the Adeptus Mechanicus during the Horus Heresy. In Betrayal we find out that there are more ships of the same type as the Furious Abyss, don't have the book here, but I can imagine that those ships were built there as well?

Callisto
According to Nemesis it's a moon of Jupiter known to hold residential orbitals above its surface by the Horus Heresy.

Amalthea
[no info yet]

Saros Station
(info taken from Lexicanum, who claim it's from Nemesis)
This space station in orbit around Jupiter resembled a vast spindle bathing in crimson glow which made it appear as if it were crystal chandelier that had been severed from its mounting and thus cast free into the void. Unlike the majority of the gas giants industrial and colonial cohorts, the station had been a resort platform by the Horus Heresy where the Jovian elite found respite as well as diversion from the works of the shipyards and manufactories. It was said that only the Venus orbitals could surpass Saros Station in luxury with its avenues of gold and silver, null-gardens, auditoriums along with the finest opera houses outside the Imperial Palace.


Saturn
Used to be home to an indepenent polity, its military arm was the "Saturnine Fleet". When they encountered the Imperium they willingly joined. (according from Battle for the Abyss)
However, portions of the Saturn system were occupied by a rival faction, the so-called Ringers, who fought against and were conquered by the Imperium, having been defeated by the Death Guard (would this have been the Death Guard, or the Dusk Raiders? Might be a slight inconsistency here).
According to the FW book Betrayal, the Imperium would also fight against aliens and their human slaves here.

Mimas
Would later house an Inquisitorial prison complex according to the novel "Grey Knights" by Ben Counter.

Encaladus
Would after the Heresy contain an Inquisitorial citadel, known as the Encaladus Fortress (according to the novel Hammer of Daemons). The Encaladus Fortress also incorporates the Admiralty Spire, where the empire of Saturn's rulers signed their treaty with the Emperor (Battle for the Abyss).

Tethys
Would in the future become an Inquisitorial/Grey Knights facility, filled with imprisoned daemons.

Titan
Would become the Grey Knights homeworld, Malcador dragged the Martian moon Deimos to it and then made it and Titan invisible for a while so the Grey Knights chapter could be formed...

Iapetus
Iapetus was a stronghold of the Ringers in pre-Imperial times. During the battle of Cassini Regio the Death Guard would defeat the Ringers there. After the Heresy it would be home to a Naval Fortress and dock that serves the strike fleets of the Grey Knights, along with the battleships requisitioned from Battlefleet Solar.

Prometheus
[no info yet]

Janus
[no info yet]

Phoebe
[no info yet]

Hyperion
[no info yet]

Epimetheus
[no info yet]

Dione
[no info yet]

Rhea
[no info yet]


Uranus
[nothing yet]

Umbriel
[no info yet]

Ariel
[no info yet]

Miranda
[no info yet]

Titania
[no info yet]

Oberon
[no info yet]


Neptune
Colonized by humanity during the Age of Terra (according to Galaxy in Flames). According to Betrayal Imperial forced had to first purge this world of its mutated population.

Triton
[no info yet]

Nereid
[no info yet]

Larissa
[no info yet]

Naiad
[no info yet]

Thalassa
[no info yet]

Despina
[no info yet]

Galatea
[no info yet]

Proteus
[no info yet]

Halimede
[no info yet]

Sao
[no info yet]

Psamathe
[no info yet]

Laomedeia
[no info yet]

Neso
[no info yet]


Centaurs
[no info yet]


Kuiper belt
[no info yet]


Pluto
[Nothing yet]

Charon
[no info yet]

Nix
[no info yet]

Hydra
[no info yet]

S/2011 P 1
[no info yet]

S/2012 P 1
[no info yet]


Makemake
[no info yet]


Haumea
[no info yet]

Hiʻiaka
[no info yet]

Namaka
[no info yet]


Eris
[no info yet]

Dysnomia
[no info yet]


Sedna
Not officially a planet, but it's the furtest thing in the Sol system. It was burnt away by the newly formed warfleet.
This was done by the newly formed warfleet, so note that before this there was no "official" warfleet, just a fleet of armed ships. Or perhaps this new "warfleet" would have been the first actual Expedition Fleet? Might it be that the departure of the Sol system was marked by the destruction of Sedna? (source: Betrayal)

The Forge World Horus Heresy Betrayal book that came out recently had lots of fun new tidbits on the Sol System's history, most of it has since been added to Lexicanum though. You've more or less summed up everything known.

I suspect that when (if ever) the HH book series hits the Battle for Terra, we'll hear a lot more about it.

I always thought it'd be funny for the Inquisition offices in the sector to be built on what used to be Moscow, but that's head-canon.

 AnomanderRake wrote:
I always thought it'd be funny for the Inquisition offices in the sector to be built on what used to be Moscow, but that's head-canon.

Inquisition in Spain

Commissars in Moscow

thats the only way to do it

While you are at it, put the biggest church/temple in Rome

It formed 4.6 billion years ago from the collapse of a giant molecular cloud. The vast majority of the system's mass is in the Sun, with most of the remaining mass contained in Jupiter. The four smaller inner planets, Mercury, Venus, Earth and Mars, also called the terrestrial planets, are

primarily composed of rock and metal. The four outer planets, called the gas giants, are substantially more massive than the terrestrials. The two largest, Jupiter and Saturn, are composed mainly of hydrogen and helium; the two outermost planets, Uranus and Neptune, are composed

largely of substances with relatively high melting points (compared with hydrogen and helium), called ices, such as water, ammonia and methane, and are often referred to separately as "ice giants". All planets have almost circular orbits that lie within a nearly flat disc called the ecliptic

plane.

http://en.wikipedia.org/wiki/Solar_System

Thanks!

Gas and Ice Giants cannot be colonised; atmosphere is poisonous, and pressure and gravity down at the "surface" are lethal.

updated the opening post.

As for the gas and icegiants. Note that the Imperium can do a lot of terraforming to fix cold climates and poisonous atmospheres. As for the gas giants, they do have moons, furthermore, what about building structures in orbit?

The wieght would kill you though. It doesn't matter if its poisoness, you have more pressure than the bottom of the ocean on you.

But still, artificial environments can be constructed. I mean, look at how we still manage to travel for kilometers into the depths of the oceans.

The depths of oceans still only have 1G of gravity. Jupiter has 2,5G.
Also, Jupiter's core, if it even exists (it's possible, even likely that the planet has no solid surface as such), is covered by a thousands of kilometers deep layer of liquid metallic hydrogen. The pressure and temperature of the upper part of that layer is ~10,000 K and 200 GPa (roughly 2 million times the atmospheric pressure of earth at sea-level).
Add to that that there's nothing of value in Jupiter and, well, why bother to go through all that trouble when the planet has loads of perfectly serviceable moons and space stations are so much easier to build, reach and maintain?

Similar arguments apply to Saturn, Neptune and Uranus; all 4 planets are gas giants.
(And the gas giants' moons and space stations are mentioned separately.)

Gasses and other elements could be used for whatever. Note that around Jupiter the Imperium built its shipyards.

Why should the Imperium only build on the surface of planets? THey could build stations in orbit. Saturn is home to the Saturnine Fleet.

Neptune was populated by humans at some point.

Yes, but you've mentioned stations separately (at least, you mentioned at least one in orbit aound Jupiter).
In any case, living in a station in orbit around a planet is quite different from actually living down in its gravity well, and while yes, Jupiter's gases could be used (mostly for fuel, as that's about all hydrogen is good for, it's easier to a) just scoop it out of the outer layers of the atmosphere or b) obtain it from more easily accessible sources (ie, just about everywhere else).

Just another example of GW/BL writers having no clue and not even bothering to do basic research about physics/astronomy despite writing for a (at least nominally) sf setting. The above facts about Jupiter were the result of 5 minutes wiki-ing (at least the numbers; I already knew the general gist).

40k generally doesn't make that much sense...I mean:

True, but stuff like that tank are merely silly.
Stuff like "yeah, Jupiter was colonised" is just stupid.

JMO, anyway.

Jupiter itself hasn't been colonized, I think the colonies were probably structures in orbit or something akin to those skycities in Empire Strikes Back.

PHOBOS delivers a tithe of IG regiments??? Aaaw come on... how many people should settle on that small moon? It's a little irregular chunk of rock measuring about 27km in its longest diameter, What kind of hive did that writer imagine...? Well... it's science FICTION, after all, I guess. Why bother with facts?

Who says that they'd need to supply millions of Guardsmen? Note that the moon has probably been fully converted into some sort of Forgeworld like thing, so it might be even bigger than before due to the many structures on and around it. Densely populated, it's possible to recruit a regiment or two from it.

I can imagine having a couple of fabrication complexes on Deimos and calling that "Forge World". But not having a population and working economy enough on such little rock to be able to spare hundreds of men and their equipment on a regular basis. Besides there is things like low gravity, you know, that would be very very unhealthy IG members... But that's merely a detail I suppose. Maybe they breed a kind of low gravity orbit-fighting specialists there. *shakes head and strolls away, praising Asimov, Lem and Niven*

But not having a population and working economy enough on such little rock to be able to spare hundreds of men and their equipment on a regular basis.

We don't know how much they built on that moon, meaning we don't know the actual size of the thing now. As for the population, we don't know the number either. Also, it's also very possible that its industry is rather automated, but that's all speculation right now.

Besides there is things like low gravity, you know, that would be very very unhealthy IG members... But that's merely a detail I suppose.

How is gravity in space? How do astronauts manage to survive in space stations? I would imagine that the Imperium would have figured a way to fix that, since otherwise it would be very difficult for such an empire to exist without all those space stations, ships, etc. in which people would have to live for years...

Of course the 40k material is very flawed, the writers aren't scientists.

But I notice that this topic has now turned into the possibility of 40k, rather than any info on what the Imperium/humanity has done with the Sol System...

 Hruotland wrote:
PHOBOS delivers a tithe of IG regiments??? Aaaw come on... how many people should settle on that small moon? It's a little irregular chunk of rock measuring about 27km in its longest diameter, What kind of hive did that writer imagine...? Well... it's science FICTION, after all, I guess. Why bother with facts?

One guy, every year; it's a very small regiment.

 Hruotland wrote:
I can imagine having a couple of fabrication complexes on Deimos and calling that "Forge World".*

Does a 'Forge World' have to specifically dole out War Materials? perhaps something in such proximity to Terra churns out Cogitators? (Well, but fancy ones it would take a FW to build, it is Holy Terra!)

 Hruotland wrote:
But not having a population and working economy enough on such little rock to be able to spare hundreds of men and their equipment on a regular basis.*

I cant remember the name, but a proposed two-mile high Hive city (real) coudl house one million in a square mile, Im not sure how many men they would provide, unless its in Skiarii (cant spell, sorry)

 Hruotland wrote:
Besides there is things like low gravity, you know, that would be very very unhealthy IG members... But that's merely a detail I suppose. Maybe they breed a kind of low gravity orbit-fighting specialists there.*

Harakoni Warhawks for the win!!!

 Hruotland wrote:
*shakes head and strolls away, praising Asimov, Lem and Niven*

*Follows*

 Hruotland wrote:
PHOBOS delivers a tithe of IG regiments??? Aaaw come on... how many people should settle on that small moon? It's a little irregular chunk of rock measuring about 27km in its longest diameter, What kind of hive did that writer imagine...? Well... it's science FICTION, after all, I guess. Why bother with facts?

What's likely is that Phobos is no longer a moon with a hive on it, but a hive with a moon somewhere in it.

I expect it was hollowed out and given a spin to simulate gravity; ie not a 27km "diameter" rock with a Hive on it, but in it.
Calculate the volume of that, and I suspect you'll end up with sizeable room for factories and whatnot.
@Currymaster: No, a forgeworld doesn't have to just spt out war materials. There can be forgeworld dedicated to spitting out nothing but toothbrushes, for instance.
It seems likely that Phobos would be well-suited for low-gravity and vacuum-based processes and industries.

 Malika2 wrote:

Venus
In Reflection Crack'd Fulgrim remembers a story of a warrior trapped in an invisible maze in the Erycinian Highlands of Venus...

So either there were lizardmen natives on Venus once or H.P. Lovecraft is still remembered in M30
("In the Walls of Eryx" ss)

Wasn't the moon said to be some super fortress with tons of defensive weaponry to help defend Terra . I wish i could give you a source.