Reglnanna

Reglnanna is a fictional planet in the Reglnai star system, featured in several works of science fiction and in related tabletop role-playing game settings. In these narratives, Reglnanna is portrayed as a water-rich world with a prominent archipelago, a modest ring system, and a diverse biosphere. The planet serves as a setting for exploration, diplomacy, and conflict between sea-based civilizations.

Etymology and naming: The name reglnanna is drawn from the Reglnai language, where it roughly translates to “home of the tides.” The term is used consistently within the fictional canon to denote the planet and its cultural landscape.

Physical characteristics: Reglnanna has a radius about 1.25 times Earth's, mass around 2.4 Earth masses, and a mean density near 3.9–4.1 g/cm3. About 85–90% of its surface is covered by ocean, creating extensive archipelagos and coral reefs. The atmosphere is a nitrogen–oxygen mix with trace noble gases. Surface temperatures in equatorial regions typically range around 24–28°C, with global climate moderated by the planet’s large oceans.

Orbit and geology: It orbits a K-type main-sequence star at roughly 0.95 astronomical units, giving a orbital period near 350 days. The planet features a faint ring system and two major moons, Nyra and Solae. Tectonic activity is moderate, contributing to active reef-building and underwater volcanic processes that shape the seafloor.

In fiction: Reglnanna is depicted as a hub of seafaring cultures, with cities built on coral reefs, floating platforms, and reef-based agriculture. Its mythology, politics, and environmental challenges are central to multiple storylines and game campaigns within the Reglnai-inspired universe.