Overall not bad, but your space shots seem to lack shadows and thus lose a lot of their potential. Also, pay attention to your composition. Most of those images are way too crowded. Keep working, you'll get better over time 
dont understand, there were always shadows included in the stuff i rendered, but obviously the placement was such that it didnt show it the way it should have... meh...
Oh, and if you used someone else's work on a render it would be nice if you put in credits.
well, i always posted a link to the persons website if i used his/hers work, always, i dont steal art like some people on some other boards
thanks for the comments tho
