Farthest Objects Ever Seen Pinpointed in the Hubble Ultra Deep Field

Detailed analyses of mankind's deepest optical view of the universe, the Hubble Ultra Deep Field (HUDF), by several expert teams have at last identified what may turn out to be some of the earliest star-forming galaxies. The sensitivity of Hubble's Advanced Camera for Surveys (ACS), combined with the penetrating power of the Near Infrared Camera and Multi-Object Spectrometer (NICMOS), finally revealed these long-sought faint galaxies. The HUDF shows that close to a billion years after the big bang the early universe was filled with dwarf galaxies, but no fully formed galaxies like our Milky Way. After careful analysis, they have been sorted out as between 54 and 108 dim, red smudges sprinkled across the HUDF image. This image shows the full sample of candidates circled in green. Three enlargements at right show several dwarf objects that are at the limits of Hubble's present instrument capabilities. The HUDF is a small region of sky in the direction of the southern constellation Fornax. The faintest objects are less than one four-billionth the brightness of stars that can be seen with the naked eye. Their light has taken nearly 13 billion years to reach Earth, and so these objects represent some of the earliest star-forming galaxies to form in the universe.

Credit:

NASA, ESA, R. Windhorst (Arizona State University) and H. Yan (Spitzer Science Center, Caltech)

About the Image

NASA press release
NASA caption
Id:opo0428a
Type:Collage
Release date:23 September 2004, 15:00
Size:3000 x 2400 px

About the Object

Name:Hubble Ultra Deep Field, HUDF
Type:• Early Universe : Cosmology : Morphology : Deep Field
• X - Galaxies Images/Videos
• X - Cosmology Images/Videos

Colours & filters

BandWavelengthTelescope
Optical
B
435 nm Hubble Space Telescope
ACS
Optical
V
606 nm Hubble Space Telescope
ACS
Infrared
I
775 nm Hubble Space Telescope
ACS
Infrared
Z
850 nm Hubble Space Telescope
ACS

Image Formats

Large JPEG
1.7 MB
Screensize JPEG
436.3 KB

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