since the camera is not pointing the same direction then the angle of lighting relative to the camera is different. One is from the side and one is from behind. Perhaps I should have said "of" instead of "and" but I bet most people can still understand what was meant. But it could be argued that the lighting conditions are different as well as the camera is in the sun when it is was lit from the side and in the shadow when lit from behind. Thus there would be exposure differences.



That is a DIFFERENT question than what I answered. Again, learn to read. There is a horizon in the asked about photo so I'm not sure why you think it "disappeared". With the low resolution and detail I'm not sure how you can tell there are a "few million hectares" missing. If you think there is not enough land showing it could be because of terrain, ie the edge of a crater or hill is making the horizon appear closer. But it is not really clear what you mean.