This is a sunset sequence. Note that the camera is not consistently leveled.
These photos are resized, curved and sharpened. Otherwise, they are untouched.
Note that just before the sunset, the sun is oval.
Also note that the lower edge of the sun is red, and the upper edge is green. These are due to refraction by the atmosphere.
1. Just before sun sets
2. Sunset sequence
3A. Top edge. Notice the green band. When the atmospheric condition is ideal, the green band will be very pronounced, so that you will see a green flash just before the sun disappears below the horizon.
3B. Bottom edge. Notice the red band.
Lesson: I was not really prepared. Should have done the photography in M mode instead of Av mode. Av mode caused some over exposures.