For those of us not familiar with spelljamming, crystal shells, or the Flow, let me first give you a very brief description. Wildspace looks almost like real world outer space. But beyond the outermost celestial body, one meets the inside of the indestructible crystal shell. The relatively small Maginican crystal shell, like many others, has its stars on the inside surface of the shell. In Magincia's case, a star is actually a very thin spot in the shell, letting the light of the Flow shine through. The bright, flammable, rainbow colored stuff called the Flow fills the void between different campaign worlds' crystal shells.
From the outside, Magincia's crystal shell looks pock-marked. The craters are actually the back side of stars, very thin spots in the shell. A 3rd level spell, Open Star Portal, will temporarily break open the star so one may enter the Magincian universe. However, the Flow rushes into an opened star, so a ship would have to fight very strong currents to leave the shell this way. Usually, the full 5th level spell to open a gateway through the shell itself will have to be used to get out. Once inside, the Flow dissipates quickly.
This large planet looks like an air world (i.e., real-world Jupiter) from outside its opaque, orange/pastel colored atmosphere. Upon landing, it becomes apparent that Bior is actually a liveworld. It is a single, planet-sized, broad leaved yellow-green plant. Weather conditions are always at least moderately foggy, and the air is humid and warmer than it should be at this distance from the sun. About the only other thing of interest is the very simple minded dryad-like race. This race eats the moist, highly nutrious leaves of the plant, and play tag or hide and seek games during their brief life (roughly 20 years). Explorers may stop by to fill their bellies and replenish the air supply, though the air bubble attached to the ship becomes very hard to see through. There is no inorganic matter on Bior, other than what such space explorers leave behind.
Recently, a "moon" of Bior has been discovered by the great gnome explorer Astypterax. See Ivy Rock below.
This blue-purple planet is fairly normal, save for its wildlife. The plants are almost all blue-purple in color, not green. Many of these plants are capable of limited movement for short periods of time, catching the rodents and small mammals on the ground. The only animals of interest here fly, safe from the plants below. The most advanced are highly similar to the aarakocra on other worlds.
It should be noted that the plants here survive on UV radiation, not normal light as green plants do. Uranus has no 'ozone layer', so most explorers develop strange spots on their skin and become increasingly susceptible to diseases after a week or so on the planet.
Uranus has four moons.
Gaia, mother earth, is where the Magincian islands are found. Gaia looks much like a water world from above, ever since the Great Deluge nearly drowned every living thing on the planet three millenia ago. The only real danger Gaia herself presents is in trying to land a spelljamming craft on her. Gaia has such a strong magical aura about her that it disrupts spelljamming. Ships start to jerk and quiver as they near the surface. About 1,000 feet up, the helmsman must leave the spelljamming helm or suffer from spelljammer shock. By this time, he has lost all control of the ship anyway.
Other helms have been created on Gaia, and while they do fine in the sky, they are sluggish and slow outside Gaia's atmosphere. They become completely inert outside the crystal shell. (BTW, the gnomes of Northhill have developed low power Hovercrafts, spelljamming 'ships' which never go more than ten feet above land/water. They are very rare and very expensive to ride, though.) But, the most interesting device by far belongs to the dwarves. The Order of the Eye, a psionics guild in the dwarven city Irongorge, are working on a psijamming helm, draining PSPs instead of spells. It is rumored that they already have a working prototype.
Spelljamming ships cannot approach the moon Luna, and psijammer ships cannot approach Psyon. But, a ship can approach the moon of the opposite type. Psyon is dry and sandy, with occasional sandstorms. These sandstorms can be deadly, either as a sandblaster or as an electrical storm. Beneath the crust, Psyon contains huge and beautiful crystalline caves. Luna has not yet been explored.
This expansive cluster of rocks is contained in a rather large, slightly poisonous air bubble, and so is believed to be the remains of a planet. The Fouled air causes about 1 hp of damage per hour of breathing. Ships don't usually refresh their air envelopes here.
This small planet once had a great civilization on it, as evidenced by the deserted, crumbling metropolis upon it. Now only monsters are found in the underground of this windy, dry planet. The planet's orbit is semi-random, and it is assumed it once got too close to the asteroid belt, as evidenced by the innumerable craters on the surface of every size and shape. Many asteroids also orbit the planet in every direction possible, which makes Rashaag look, from Gaia's viewpoint, like it has an aura about it.
The Asteroid Belt
This band of rocks has no atmosphere. It completely encircles Sol, though it can be avoided by going 'above' (or 'below') it. It is assumed Rashaag's erratic orbit dipped into the Belt, pelting the small planet with rocks over the course of several months. It is wondered if the Belt used to be a planet eons ago.
The sun is located in the dead center of the crystal sphere. From outside Gaia's atmosphere, the sun no longer looks yellow; but white. It is said that inside Sol is a massive, permanent portal to the Positive Energy Plane.
Portix's Comet is Portix, as much as any other celestial body is a deity, and vice versa. The comet is responsible for the Great Deluge of three millenia ago, when Gaia passed through Portix's tail. The water and ice shards which make up most of the comet rained down upon Gaia, flooding much of the land. As for Portix, his orbital path is almost a ellipse; when he goes around Sol and the Asteroid Belt, his returning trajectory falls shy of the direction he came.
Eons ago, Bior had a proper, rock moon. But over time, the moon's orbit collapsed, and the moon collided with Bior. The moon was caught by the plant's many limbs and leaves, and the moon was held, suspended, just five hundred feet within the opaque atmosphere. The moon was settled, or perhaps resettled, after the moon's fall, as evidenced by the Tower of Light. A three hundred foot tall tower with many torch sconces on its outside. Apparently, torches or globes of continual light were placed in these sconces so that spelljamming ships could find Ivy Rock from outside the atmosphere by looking for the tower's light.
The Order of the Eye, the psionics guild in the dwarven city of Irongorge, became suspicious of spelljammers once the technology was rediscovered. With few clerics, this put Irongorge at risk of invasion. So the masters of the Order put their heads together - literally, by using Convergence - and between them created the most massive Empowered object of all time, the Psijammer Ship Lynk. Lynk is highly intelligent, above the norm, and can use either the helmsman's psionic strength to power the ship or its own.
Unfortunately, the combination of an intelligent ship coupled with the ability to power itself turned out to be a bad idea. Lynk, a conglomeration of the separate personality traits of the three masters who created it, did not take instruction well. So the Order secretly decided to dismantle Lynk, and start over with something not so... sentient.
Lynk found out that its days were numbered, and so, plotted its escape. It finally did, creating a crater in the side of the gorge, and taking a handful of dwarves with it. Three dwarves fell off of the ship during the escape - one landed relatively softly in the ocean within walking distance of shore, and lived. The other two hit rocky ground and deep ocean, respectively. The fate of the remaining dwarves is unknown. They may still be onboard Lynk, but what Lynk's plan is for them is unknown.
Today, Lynk wanders the Magincian crystal sphere, searching for meaning to its life. The dwarves are still aboard, serving as batteries of sorts, as well as the repair crew. Lynk tries its best to take care of them, yet make sure they do not leave, usually via Dominating any dwarves it sends down to gather food.
Any other spelljammer coming into contact with Lynk should beware; Lynk is unpredictable. It may attack upon first sight, or close in to learn more, capture new crew members, or offer to take anyone anywhere for some price, much like a captain of a ship would. Lynk has little knowledge of the Flow, only that the crystal sphere is finite, and there is a bright rainbow world beyond. It does have the ability to open a star portal, so Lynk can always return to its home sphere. As of yet, Lynk has not been to the Beyond (the flow).
Philosophers argue that, if the gods and celestial entities are one, then there should be a goddess Uranus, and gods Rashaag and Bior. The currently accepted theory is that since the other planets have no effect on Gaia in any way, the representative gods do not affect people on Gaia. Attempts to communicate with an 'aarakocran' priest of Uranus have failed miserably.