The Hubble Extreme Deep Field . ... Credit Copyright: NASA , ESA , G. Illingworth , D. Magee, and P. Oesch ( UCSC ), R. Bouwens ( Leiden Obs. ), and the XDF Team Explanation: What did the first galaxies look like? To help answer this question, the Hubble Space Telescope has just finished taking the eXtreme Deep Field (XDF), the deepest image of the universe ever taken in visible light . ... The Hubble Space Telescope 's ACS camera and the infrared channel of the WFPC3 camera took the image. ...