Astronomical Coordinates Summary. Relative to Observer Local Horizon Local Meridian Local Zenith Altitude-Azimuth Coordinates Pro: Easy to record for instantaneous position Con: Objects change angles (coordinates) throughout the night
At the summer solstice, the North gets more direct sunlight
and more hours of sunlight. At the same time it is winter in the South
(less direct sunlight, fewer hours of daylight).
At lat. = 20
On equator, lat. = 0
At lat. = 50
At pole lat. = +90