There are very few patches of the sky where if you look you won't see (very many) stellar objects or galaxies. Astronomers know about them--they're great for ca

There are very few patches of the sky where if you look you won't see (very many) stellar objects or galaxies. Astronomers know about them--they're great for calibration of instruments. That said, Hubble took a many-day exposure of one of these ultra-deep regions, and this is what it saw: http://hubblesite.org/gallery/tours/tour-hudf/ http://hubblesite.org/gallery/tours/tour-hudf/