Taken simultaneously with the Hubble Ultra Deep Field, the Hubble Ultra Deep Field-Infrared image provides a look even farther back in time than the Hubble Ultra Deep Field.
The Hubble Ultra Deep Field is a visible light image taken with Hubble's Advanced Camera for Surveys, but astronomers also used Hubble's Near Infrared Camera to find distant galaxies that cannot be seen in visible light. The light from the farthest galaxies has shifted from visible wavelengths to infrared wavelengths by the expansion of space.
This image combines both Hubble's visible light and infrared observations into one image.
Credit: NASA, ESA, and R. Thompson (Univ. Arizona)
For more information, visit:
hubblesite.org/contents/media/images/2004/07/1467-Image.h...
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