Eamon is the largest and innermost planet orbiting a white star near the core of the Milky Way Galaxy. The inhabitants of Eamon usually refer to this star simply as the Sun, but also identify it as Eldur — or sometimes Great Eldur to distinguish it from Little Eldur, a distant golden companion which orbits the rest of the system. The world is slightly smaller than Earth, with an equatorial circumference of roughly 23,000 miles, and is orbited by three moons and a handful of small asteroids.

Being near the crowded core of the galaxy, Eamon's night sky is a spectacular sight, densely strewn with nearby stars and alive with vast, colorful nebulae. Addar's scholars have charted the heavens in great detail and have an accurate understanding of the movements of the celestial bodies around Eldur, though little is known about these other worlds.