The size of this feature’s uniformities is determined by the extent of Silk damping. (10[1])The BOOMERanG and MAXIMA experiments (-5[1])both imaged this feature with a balloon at an altitude of 40 kilometers. This feature’s polarization is divided into E- (10[1])and B-modes. (10[6])The Sachs–Wolfe effect induces (10[2])anisotropies (10[1])(“an-eye-SAW-truh-peez”) in this feature from gravitational redshift (-5[1])at the surface (10[2]-5[1])of last scattering. A void in the constellation Eridanus is an explanation of a “cold spot” in this feature (10[2])that was observed (10[2]-5[1])by the (10[1])COBE (10[3])(“KO-bee”) and Planck (10[1])satellites. Arno Penzias (10[1])and Robert Wilson discovered this feature after making sure it wasn’t interference from bird poop (10[1])on their antenna. This (10[1])feature has a near-perfect blackbody spectrum at about 2.7 kelvins. For 10 points, name this leftover radiation from the Big (10[1])Bang. (10[1])■END■ (10[4]0[4])