Here again the link-list to all pictures I've used to create the picture (I think I now know the reason why it was never shown in the steepshot-description: steepshot doesn't support multiple paragraphs in it):

https://pixabay.com/de/sonnenuntergang-abendd%C3%A4mmerung-3048133/
https://pixabay.com/de/wolken-foto-von-den-wolken-der-cloud-2129514/
https://pixabay.com/de/treibeis-gefroren-meer-wildnis-eis-3048157/
https://pixabay.com/de/milchstra%C3%9Fe-sternenhimmel-2695569/
https://pixabay.com/de/dublin-irland-trinity-2507902/
https://unsplash.com/photos/sMQiL_2v4vs