Chandra X-ray Image of Abell 2029
The galaxy cluster Abell 2029 is composed of thousands of galaxies enveloped in a gigantic cloud of hot gas, and an amount of dark matter equivalent to more than a hundred trillion Suns. At the center of this cluster is an enormous, elliptically shaped galaxy that is thought to have been formed from the mergers of many smaller galaxies.

Scale: Image is 4 arcmin on a side
(Credit: NASA/CXC/UCI/A.Lewis et al.)

DSS Optical Image of Abell 2029
This optical image shows thousands of galaxies in the cluster Abell 2029. The image was taken with the Palomar 48-inch Schmidt telescope.

Scale: Image is 4 arcmin on a side
(Credit: Pal.Obs. DSS)

Chandra X-ray & Optical Image with Scale Bar
Scale bar = 48.5 arcsec
Credit: X-ray: NASA/CXC/UCI/A.Lewis et al. Optical: Pal.Obs. DSS