Red planet

This is the result of a training ! I use this model here : [link] but I don't know who realised it !
And I did what you see below ! It took me so many times...
Done only with Photoshop and wacom volito II.

How ? A friend showed me that by looking at references (pictures found on books, magazines and web), I can understand rocks, moon, shadows... It's very hards to do, I made many mistakes, want to stop... I tested many photoshop tools... Rescale moon, rocks, use photograph tips like blur...

Same ideas here : [link]