Missions present stresses and challenges that must be addressed spatially, reflecting the strict flow of tasks typical of space missions. But since sustained social and mental health are also mission critical, MARSHA offers elements of surprise and literal room for the crew to slip outside of an overly prescriptive existence. MARSHA's layout is zoned with both of these principles in mind.
Each level has at least 1 window, which, together, cover the full 360 degree panorama. Indirect natural light from the large water-filled skylight and intermittent windows floods the interior while still keeping the crew safe from harmful solar and cosmic radiation. Circadian lighting, designed to recreate Earthly light, is employed to maximize crew health.