Andromeda Harbor pictures - / this look unrealistic for me, maybe areal night scene with the black/grey sky would make look those space ships more real and blend with the scene background. Overall idea is great, so u are in the right way; just turn sky in black and merge it with your stared sky and let out the un-real colors. Then you would see the difrence, sure a photo taken by NASA ahhh i forgot add some fire behind the space ships / Your blue galaxy showing through the fog is a good effect, try maybe showing a tiny bit through all the fog to make it seem see through rather than a olid white fog... using a layer mask and the Dodge tool will let you show just tiny bits through as well as give it a uneven appeal.
Like in old Rome pictures - Found during recent escavations in Rome near "Colosseo" / I don't get it. Aside from that, making the images inside the whatever-it-is more stone-like would really help this chop.
Absolut Gerome pictures - Jean-Léon Gérôme "The Pelt Merchant of Cairo"
Jerome Bettis pictures - 
Cromer Life Boat. Norfolk GB pictures - 
Absolut Rome pictures - Cortile della Pigna Rome, Italy
Napolean Syndrome pictures - Self-explanatory is you understand Napoleon Syndrome.
Andromeda Harbor pictures - / this look unrealistic for me, maybe areal night scene with the black/grey sky would make look those space ships more real and blend with the scene background. Overall idea is great, so u are in the right way; just turn sky in black and merge it with your stared sky and let out the un-real colors. Then you would see the difrence, sure a photo taken by NASA ahhh i forgot add some fire behind the space ships / Your blue galaxy showing through the fog is a good effect, try maybe showing a tiny bit through all the fog to make it seem see through rather than a olid white fog... using a layer mask and the Dodge tool will let you show just tiny bits through as well as give it a uneven appeal.
Space promenade pictures - / Looks as if someone took a bite out of the earth
The Jerome Kerviel Affair pictures - Inspirated by the thomas crown affair based on true story 
Like in old Rome pictures - Found during recent escavations in Rome near "Colosseo" / I don't get it. Aside from that, making the images inside the whatever-it-is more stone-like would really help this chop.
Portrait of Sharon Stone by Gerome pictures - Portrait of Sharon Stone by Gerome