Behemoth

(This world idea is for a sci-fi mod for some sort of civilization type game, hopefully one with multiple map abilities.  I'm not sure if this will happen, but have come up with some general ideas for the mechanics and worlds for it.)

General Description

This roughly Jupiter sized planet is the next planet out after Cryolith.  Like Jupiter, it consists largely of Hydrogen and Helium, with trace other compounds, and is covered in jets, eddies, and storms.  Also like Jupiter, a large collection of moons surrounds the planet, including three large ones considered at one point for colonization.  However, the strangest feature of the planet is a collection of large, high tech platforms floating in the atmosphere.

Atmosphere

The atmosphere of Behemoth resembles Jupiter in the large details, with strong bands of winds at different latitudes, and different cyclones forming within the bands, moving around the planet, and either dissipating or merging.  The atmosphere even has several large cyclones approaching the size of Jupiter's red spots and large white ovals.

Moons and Magnetic Field

Like the Sun's outer planets, Behemoth has a large number of orbiting moons, with small inner moons interacting with rings, irregular outer moons, and large middle moons.  The three middle moons, Fumarole, Doppel,  and Frigis, were all considered as possible colonization sites, and have their own unique features.

Like Jupiter, Behemoth has a strong and large magnetic field.  Fumarole, and Doppel to a lesser extent, produce gases that fill a similar role to emissions from Io, generating plasma that interacts with the magnetic field and contributes to materials within it.

Platforms

The strangest features of Behemoth are a series of platforms floating within the planet's atmosphere.  From the surface, most platforms are buried, but a few can be spotted by radar, or occasionally when cloud features change.  They remained a mystery for a long time after initial settlement, but over time, scientists managed to determine a number of properties.

The platform appear to be made of mainly solidified hydrogen and helium, with a thin layer of organic material covering the top, either a form of life or some sort of building material.  Examination has uncovered apparent caverns, spires, conduits, and other formations that suggest the platforms were once energized, and possibly lived in.  The exact details of how the platforms were made, or how they stayed stable, as are whether the platforms were built by one of the civilizations that colonized Phobis Terra.

The platforms appear to have little effect on the large scale weather of Behemoth, partly due to their small size, and possibly due to networks that allow gases to flow freely.  There have been some slight temperature changes over the platforms, more obvious in rising areas, and lightning storms are much more common near the edges, while being less common over the interiors.  Vortexes also seem less common.

Explanation

(Disclaimer:  I am not in fact any sort of geologist, atmospheric scientist, planetary scientist, or anything related.  While I do occasionally attempt to read some papers, and more complex books, about planets for fun, I'm nowhere near an expert on any of this, and am making up these planets to have interesting characteristics, whether or not they would be be possible, and the resulting attempts at planets will read appropriately.  If any one of the above types of scientists is reading this and pulling their hair out, I understand completely.  :)  )

This world is meant to be like Nona from the Civilization 2: Test of time Sci-fi game.  Like that game, this planet is meant to be an end game area, and will reveal things within the mod's story that I don't want written out on a post like this (And, actually, haven't made up when the post was written.  :)  ), so there isn't much I can describe about the platforms.  Otherwise, I don't imagine the planet being unusual enough compared to Jupiter to have much description in this post.  However, the moons will get their own descriptions in future posts.