Ultra Deep Field: Looking Out into Space, Looking Back into Time

This sixminute visual exploration of the Hubble Ultra Deep Field showcases the characteristics and contents of this landmark observation, as well as its fourdimensional nature across both space and time. In particular, galaxies are seen to more than 12 billion lightyears away, 12 billion years ago, allowing astronomers to trace the development of galaxies across cosmic time. A deep field is a long exposure on a small field of view to observe the faintest objects possible. The Ultra Deep Field (UDF) represents the deepest visible light observation of the universe (deeper views are extensions, subsets of this 2004 image). Containing about 10, 000 sources, the UDF provides a statistical sample of galaxies across the universe. In this sequence, the threedimensional model of the UDF data set uses NASA and other images and source catalogs. More than 5000 galaxies with crossmatched image cutout and distance measure are placed in their correct relative position throughout the long thin pyramid of the observat