- space medicine
- space medico-engineering
- space menu
- space metrology
- space microbiology
- space mission
- space mixing color
- space modeling
- space motion
- space motion of planet
- space motion of stars
- space motion sickness
- space mutation breeding for forage plants
- space navigation
- space net
- space notation
- space nuclear power plant
- space nuclear reactor power
- space nuclear technology
- space nutrition
- space nutrition discipline
- space object surveillance satellite
- space observation
- space observatory
- space of analytic functions