Realmspace was the term used to describe the Torilian system and its surrounding environs within the Prime Material Plane. To those on the surface of Toril, Realmspace was called the Sea of Night, while the Netherese referred to it as the Skyward Realms. Contained within a crystal sphere suspended in the enormous expanse of the phlogiston, Realmspace consisted of wildspace (empty vacuum), a sun, eight planets and their satellites, and a variety of asteroids, comets, and nebulae.
The Solar System
The Sun
The largest fire body of Realmspace is located at its centre and radiates a comfortable amount of warmth throughout the entire sphere. It is particularly susceptible to solar flares, which erupt almost continually.
Anadia
One of the two Dawn Heralds, this small, amber-and-green-coloured planet is closest to the sun and mostly populated by halflings and umber hulks. It is covered in canyons that dwarf the Great Rift, and the equatorial regions are unliveable because of the sun’s proximity.
Coliar
Coliar is a gas giant mostly populated with avian life-forms and other flying creatures. Floating islands of water and earth revolve around the planet’s core. The planet is covered with clouds and appears as a grey-white sphere from Toril.
Toril
The third planet in the system is the most populated, teeming with life. Approximately 60% of the surface being covered with water, fauna on Toril ranges from creatures living in the air, on the land, under the water and subterranean habitats. This planet was formerly known as Abeir-Toril.
Selûne
Selûne is Toril’s largest natural satellite. It orbits about 183,000 miles (295,000 kilometres) from Toril. Only one side of it ever faces the planet; the other side is called the “dark side”, yet it was not always dark. This is where the most activity takes place. Although Torilians named it after the deity Selûne, the moon’s own inhabitants named their home after Leira. Trailing in the orbit of this satellite are the Tears of Selûne.
Karpri
The first of the Five Wanderers, Karpri, the fourth planet in the system, is an oceanic world. It is an absolutely beautiful place to behold from wildspace. From Toril it appears as a large star but as a sapphire ball with white caps when viewed by magical means. The poles are covered in ice hundreds of miles thick and stalked by deadly cold-loving predators, while floating on the equator’s waters seaweed can be found, which can support up to five tons of weight but is also home to massive, dangerous insects. The waters of the world are inhabited by aquatic elves and predacious sea life, making this planet as dangerous as it is beautiful.
Chandos
The next of the Five Wanderers, Chandos is another oceanic world. Its seas contain lumps of rock that, when piled high enough, create highly unstable islands. Those living on these islands are the human, dwarven, and orcish descendants from a pair of spelljammers that crash-landed here long ago. Over time, they lost their technologies and developed an enmity for each other, forgetting their pasts and becoming primitive. From Toril, this planet appears as a greenish-brown smudge, which changes over time.
Glyth
The third of the Five Wanderers is a grey planet that has a beautiful ring and three satellites observable from Toril. In truth, Glyth is a harsh, ringed planet that, as of the mid-14th century DR, has been occupied by the dreaded illithid for about a century. Plant life is continually burned by the harsh atmosphere or by the mind flayers to prevent their humanoid cattle hiding from them. A remarkably pure, edible gelatine “water” can be found in the place of seas, and while the planet still has ice caps as normal, nothing lives there. Most activity occurs underground. As well as the planet’s rings, Glyth is orbited by three satellites. One, known as Haven, is a hollowed out asteroid and treated as neutral ground for the different mind flayer factions. Another, Mingabwe, is a trading port for non-illithids. Orbiting Mingabwe is Polluter, an unmapped asteroid. A group of over 300 mercenaries from the Code Helm reside here conducting raids against illithids in the system.
Garden
Garden is not actually a planet. It is a series of earthy-masses connected together by a massive plant. Non-sentient life-forms create a balanced ecosystem with the many varieties of plant life growing here, but otherwise it is populated by pirates. Garden is also orbited by twelve satellites. Garden can rarely be seen from Toril, but when it is spotted, it appears as a tiny green speck.
H’Catha
The last of Toril’s Five Wanderers, H’Catha, appears as a crystalline glimmer of white. Consisting of a flat disc of 480‑kilometer-thick water with a single mountain in the centre, close-up, this world looks like a giant wagon wheel, with the Spindle (the mountain) always pointing directly at the sun. Near the base of the mountain, six ports, each owned by a different type of beholder, accept spelljamming traffic from non-H’Cathan beholders and the Arcane. Other species are only allowed to land if they have goods to trade and leave as soon as they are done. The world is orbited by two satellites, Turnbetl and Lumbe.