Antar 4 is the fourth of six moons orbiting the gas giant Antar in the Prindaar system. The moon is composed primarily of silicon, nickel, and iron, with large magnetite deposits located throughout its crust. Water covers over 70 percent of the surface, although the moon's unusual rotational pattern prevents the formation of icecaps. Antar 4's rotational axis is almost parallel to its orbital plane, making seasonal climatic fluctuation extremely pronounced. The climatological variations are further complicated by the moon's intricate day/night cycles.  At other times, when Antar 4 is completely hidden in the shadow of Antar, neither side of the moon experiences daylight. Conversely, Antar 4's sister moons will periodically illuminate its night cycle at various points during its orbit of Antar. Despite all these factors, Antar 4 does occasionally have typical day/night cycles.

These changes play havoc not only with the moon's weather cycles but also with the rhythmic patterns and sensory apparatus of all manner of life-forms. The erratic seasons and climate prevent the establishment of any type of growth patterns for planets, forcing them to constantly seed and grow whenever conditions are favorable.

Because of the extreme variability of natural light sources, animals on Antar 4 rarely rely on sight as their main sense. Some employ echolocation, others rely almost entirely on smell, and still others utilize hearing.