What are the main factors that affect the time of sunrise and sunset?

1, the position of the earth in the orbit of revolution (the ideal spherical surface in the northern hemisphere is long in summer and short in night)

2. Latitude (the higher the latitude of the ideal sphere, the more uneven the distribution of day and night)

3. Altitude (the higher the altitude in the same place, the earlier the sunrise and the later the sunset)

4. Weather conditions (atmospheric refraction and scattering)

5. Artificially designated non-local time zone (for example, Urumqi uses local time 1 16 east longitude to tell the time, which is not a natural factor).