небесна сфера
military sphere
sonar sphere
defense sphere
corrosive atmo-sphere
isothermal gas sphere
turbulence sphere
sphere
celestial body
celestial and satellite navigation systems
celestial coordinate system
celestial equator
celestial horizon
celestial meridian
celestial monitoring
celestial navigation system
celestial time
celestial navigation
atmosphere-bearing celestial body
celestial forces
celestial guidance
celestial navigation instrument
celestial position finding
celestial reference
celestial-inertial guidance