i was just wondering there's a store that can print this and make it like a big poster size that you can frame and put on walls. Me and my friends thought it would be a nice christmas present for our science teacher since he goes climbing and we studied about space in his class, and we could just sign it and give it to him.
contact the artist and ask him for full size, then give him some $$ and ask him for a site to print it, then give that site some $$ and they will send it to you by mail most likely
you made it that size? you should have made it bigger, If you resize it much it will lose quality and look like crap, so you can resize it poster size
deviantart.com (but you need a print account) cafepress.com (just make your own account then create a print in your shop)
well theres this store near me called DAN's i doubt you have one but they print photos to poster size. well i think they do or if your school has a cad lab they usually have a printer for large paper, it probobly wont be as good quality but at least its somthing
First, make the image bigger. 600x600 is far too small to even print out and enlarge properly. You'll need to have it around 2400x3000 and 100 DPI to make it a small poster. :\