/r/ing hi-res Hubble space telescope pics, preferably of the pillars of creation
http://www.hubblesite.org/ go nuts.
http://hubblesite.org/newscenter/archive/all of the newer HST press releases contain hi res and ultra hi res images (some files are over 2 or 300 megs). older press releases from the older instruments contain some high res stuff nonetheless.
Also, Carina Nebula > pillars of creation.