Observing basics
方位角
Azimuth
Horizontal angle measured clockwise from north.
East is 90°, south 180°, west 270°.
Related terms
- Red light — Reading charts under red light to keep dark adaptation.
- Pickering scale — A 1–10 scale for how steady a star looks.
- Transit — An inner planet crossing the Sun's disc.
- Occultation — A nearer body hiding a farther one.