Stalking though the space, the cosmonauts have wandered over an undiscovered yet planet, inhabited by various spooky creatures...

Tip (Photoshop CS3): Quick Selection Tool (it's under the less useful in this situation Magic Wand) is very handy for cutting out the pencil drawing out of it's background. Faster than Lasso!
(Well, honestly, not so Traditional)

EDIT: the world in the title was not supposed to mean anything indecent, just in case you have any such associations. One should be careful when inventing words, anyway.