The Norrathian Solar system can be seen in via a model set up in the Academy of Arcane Sciences in Freeport and is composed of 4 planets revolving around the sun of Sol. The book "Immortals" found via part of the Monk epic 1.0 quest reveals their names as well. The additional information was provided by the EQ dev Vhalen.
Norrath's sun Sol is a Yellow star in the Diamond Shoal Nebula and was called Solus in ancient times.
A molten body with a molten core, water vapor, a sulfurous atmosphere, and desolate climate.
A solid body with a molten core, liquid water, breathable atmosphere, and various climates. Norrath has 2 moons, Drinal is visible from Norrath while Luclin can only be seen from the Plane of Sky.
Luclin: Ringed Moon, A solid body with a molten core, liquid water, breathable atmosphere and a tropical climate.
Drinal: Grey Moon, A solid body with a solid core, frozen water, minimal atmosphere and a desolate climate.
A solid body with a solid core, no water, no atmosphere and a desolate climate. Anbeal has an oblong orbit around sol, making it at times the third or fourth planet away from Sol.
A gaseous body with a solid core, no water, poisonous atmosphere and a desolate climate. Cordan has three rings of ice particles and space debris.