Data from antipodal places: First use of CMB polarization to detect gravitational lensing from galaxy clusters

Data from antipodal places: First use of CMB polarization to detect gravitational lensing from galaxy clusters
Galaxies. Amalgamations of stars, interstellar gas, dust, stellar debris and dark matter. They waltz through the cold universe, gravity nurturing their embrace. Occasionally, galaxies snowball into enormous galaxy clusters with masses averaging 100 trillion times that of our sun.
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