Welcome to NASA's data center for Cosmic Microwave Background (CMB) research.

This site provides CMB researchers with archive data from NASA missions, software tools, and links to other sites of interest. As a resource for the CMB community, your suggestions are encouraged, and your acknowledgements are appreciated.

The High Energy Astrophysics Science Archive Research Center (HEASARC) and the Legacy Archive for Microwave Background Data Analysis (LAMBDA) have merged into a single organization that will use the name HEASARC. The merged archive will continue to provide all of the services currently being offered by the two archives, while better serving users interested in studies requiring both high energy and microwave data. Users will notice few immediate changes, but we will gradually fully integrate all the services of the archives.

Planck 2013 Papers Planck 2013 Resources at ESA Planck 2013 Data Products at IRSA WMAP Nine Year Papers WMAP Nine Year Cosmological Parameters WMAP Nine Year Data Products The top image is the WMAP 9 year W-band CMB map and the bottom image is the Planck SMICA CMB map. Both maps are foreground-cleaned, WMAP by subtracting a linear least squares fit to the Planck dust and low-frequency templates.

Planck-WMAP Parameter Comparison - SVG Link If you are not a researcher, you may still find interesting information on the WMAP Public Site and our theory site links.