การดู
The Sky Part 1: Local Sky and Alt-Az / Horizon Coordinates
Altitude/Azimuth Lesson
Celestial Sphere - altitude/azimuth
HOW TO MEASURE SOLAR ANGLES | DEFINITIONS
Azimuth-Elevation Coordinate System
The Sky Part 2: Explaining Alt Az
Altitude-Azimuth vs RA-Declination
How to measure altitude and azimuth