Astronomers at Germany's Ruhr-Universitat Bochum have unveiled the largest space map ever compiled on Friday. The image is composited from some 268 individual shots captured over the past five years and spans a staggering 46 billion pixels. That's 855,000 by 54,000 pixels. "If you would want to display this in full resolution on full HD TV screens, you would need more than 22,000 screens," Moritz Hackstein, a PhD candidate who conducted the survey as part of his thesis, told CBS News.