noun, noun which may take the genitive case particle 'no'
Astronomical term for the point directly overhead; also used in geometry for the vertex of a curve.
Tonight the moon will reach its zenith.
天頂の星を観測する。
Observe the star at the zenith.
zenith telescope
zenith
quasi-zenith
geocentric zenith
astronomical zenith
From 天 (heaven, sky) and 頂 (top, summit), literally 'sky top'.