This one is incredible, even better than the ultra-high resolution shots of Orion. This one is of the Tarantula Nebula, also known as 30 Doradus, in the Large Magellanic Cloud a satellite galaxy about 170 000 light years away.
Taken by the European Southern Observatory the full image is 256 million pixels, and weighs in at 211MB! The whole image covers about 4 full Moons in size.
This nebula contains about half a million times the mass of our Sun, if it was as close as the Orion nebula it will fill the entire constellation of Orion and be bright enough to cast shadows. Also framed within the picture to the right-hand border of the nebula is the remains of Supernova SN 1987A a star that exploded nearly 20 years ago, the Honeycomb Nebula can also be seen in the same area and to the left is NGC 2100.
The above image doesn't do the full thing justice so make sure to download the decent resolution ones from the ESO website, these two are the best to download to get the best of the image 3412x3000 JPEG (16MB) and 8952x7872 TIFF (211MB).