Blending between the ACS and NICMOS Hubble Ultra Deep Field

This historic new view is actually two separate images taken by two instruments: Hubble's ACS camera and the NICMOS instrument. The combination of ACS and NICMOS images will be used to search for galaxies that existed between 800 and 400 million years after Big Bang.

NICMOS sees even farther than the ACS. It reveals the farthest galaxies ever seen because the expanding universe has stretched their light into the near-infrared portion of the spectrum.