Most detailed image of night sky unveiled
Images of the northern and southern hemispheres of our galaxy (bottom) reveal "walls" of galaxies that are the largest known structures in the universe. Zooming in on a patch of sky in the southern hemisphere reveals the spiral galaxy M33 (top left). Zooming in further (top centre) reveals a region of intense star formation known as NGC 604 (green swirls, top right) (Image: M. Blanton and SDSS-III)
It would take 500,000 high-definition TVs to view it in its full glory. Astronomers have released the largest digital image of the night sky ever made, to be mined for future discoveries.