Laythe

Laythe is a moon of the gas giant Jool in the Kerbal Space Program universe. It is the system’s largest ocean world and is often described as the most Earthlike moon in the Jool system due to its extensive liquid bodies and a relatively substantial atmosphere that can support air-breathing flight.

Geography and geology: The surface of Laythe is dominated by global oceans, interspersed with archipelagos and a few sizable landmasses. Coastal regions are widespread, offering diverse shorelines, shallow lagoons, and channels that carve through the water. The predominance of liquid water shapes the world’s geomorphology and weather patterns, making sea-based exploration a central aspect of missions.

Atmosphere and climate: Laythe possesses a nitrogen-oxygen–rich atmosphere with surface pressures similar to Kerbin. This makes it feasible to operate conventional aircraft and seaplanes, enabling sustained flight across the skies and frequent aerial survey of coastlines and islands. Weather systems, including winds and precipitation, influence mission planning and vehicle performance.

Orbit and exploration: Laythe orbits Jool and experiences tidal interactions with the giant planet that contribute to its dynamic environment. The combination of air and water surfaces invites a variety of craft, from jets and prop planes to boats and submarines, for exploration, resource gathering, and base-building.

Exploration and missions: In player-created missions and official tutorials, Laythe serves as a focal point for integrating aerodynamics with marine capabilities. Its accessible yet challenging terrain makes it a popular target for early-to-mid career endeavors, as well as for demonstrations of multi-environment design.

See also: Kerbal Space Program, Jool system, Laythe exploration.