The POLARBEAR project uses the HuanTran Telescope in Chile to measure the polarization of the cosmic microwave background.
The expected announcement today (Monday, March 17) from Harvard's Center for Astrophysics that the BICEP2 (Background Imaging of Cosmic Extragalactic Polarization) experiment may have found proof of inflation in the early universe comes on the heels of a March 10 report from a rival group, POLARBEAR , that similar measurements of microwave background polarization can be used to map the large scale structure of the universe, and perhaps determine the masses of neutrinos. Both groups measured the "B-mode" polarization of microwave emissions from the early universe - the so-called cosmic microwave background (CMB).
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