Pictures of anything with the Sky as background (not just landscapes where the sky is at top- it must be the background of the whole photo.
NO Pictures with Focus on the sky! Biggest part of the photo have to be in the Sky .
NO typical photos of Clouds or Sunsets or the Moon!
The main thing needs to be an Object, Plant, Animal or Human, not the sky itself....!
To say it in a few words: You have to take your photo upwards, not horizontal to get the sky as the background - with an ob…