PIA15634: Hidden Patterns of Light Revealed by Spitzer
 Mission:  Spitzer Space Telescope
 Instrument:  IRAC
 Product Size:  2824 x 732 pixels (w x h)
 Produced By:  IPAC-Caltech
 Full-Res TIFF:  PIA15634.tif (6.205 MB)
 Full-Res JPEG:  PIA15634.jpg (540.7 kB)

Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original)

Original Caption Released with Image:

poster version for PIA15634
Poster Version
top panel figure for PIA15634
Top Panel
lower panel for PIA15634
Lower Panel
Click on images above for full resolution tiff

Astronomers have uncovered patterns of light that appear to be from the first stars and galaxies that formed in the universe. The light patterns were hidden within a strip of sky observed by NASA's Spitzer Space Telescope.

These two panels show the same slice of sky in the constellation Boötes, dubbed the "Extended Groth Strip." The area covered is about 1 by 0.12 degrees.

The top panel shows Spitzer's initial infrared view of this patch, including foreground stars and a confusion of fainter galaxies, seen at a wavelength of 4.5 microns.

In the lower panel, all of the resolved stars and galaxies have been masked out of the image (grey patches), and the remaining background glow has been smoothed and enhanced. This processing reveals structure too faint to be seen in the original image.

The structure of the lower panel matches just what we would expect for the patterns of clusters from the first galaxies formed in the universe. Even though any particular early galaxy would be too faint to see individually, this technique allows astronomers to better understand what things were like shortly after the Big Bang.

Image Credit:

Image Addition Date: