There's a lot to think about here..... I sat through a train of thought. The sky is pretty dark for so many suns lighting it up, so I assume it doesn't have much atmosphere, but some, as there's some blue going on. Is such a low atmosphere feasible for a planet with so many suns? Yet there's clouds, low clouds, and oh, there's even water, would that work? And the rock formations would have had to have been carved by water, I think? or maybe those 'suns' are all much farther away then our sun is. I don't know. I'm not a scientist, I don't know the answer to these questions.
Well, this planet have one parent star much more smaller and dimer than our sun. That star belongs to this star cluster (It is actually night time because the parent star is below horizon). And yes, stars from the cluster is much more farther away. So combined all these suns there is enough warmth and light to sustain liquid water and some life forms. But this planet is dryer than earth, because it is pretty hot at low latitudes, temperatures are more friendly near its poles where water can egsist in form of warm rivers and lakes. These rock formations appear to be some ancient volcanic activity result. And about atmosphere. This planet is way more massive than our earth and because of that it has strong magnetic field protecting planet from harmful cosmic rays... Atmosphere itself is thick just like ours... the reason why sky is so dark because i just thought it would look cooler. In the original picture sky ended to bright and i just wanted it to be darker. It is possible to do so with real photos to, somehow it brings more dept than real light sky.
And about atmosphere. This planet is way more massive than our earth and because of that it has strong magnetic field protecting planet from harmful cosmic rays...
Atmosphere itself is thick just like ours... the reason why sky is so dark because i just thought it would look cooler