the atmosphere

sphere ②category

(being) within range (radio, commuting, etc.)

(being) out of range (e.g. mobile network, radar, missiles)

the capital city (often Tokyo) area (typically within 50 km of city's center) (center)

outside Earth's atmosphere

stratosphere

safety zone

gravitational sphere (of a celestial body)

gravitational field (of a celestial body)

within Earth's atmosphere

Arctic Circle

storm zone

within the sphere of influence (of)

sphere of influence

magnetosphere

cultural sphere

one's daily milieu

Antarctic Circle

troposphere