A Flat Universe from High-Resolution Maps of the Cosmic Microwave Background Radiation In 2000, a team of researchers led by P. de Bernardis and colleagues reported the first high-resolution maps of the Cosmic Microwave Background (CMB) radiation, revealing a peak in the angular power spectrum at multipole ℓ_peak = (197 ± 6). This finding supports inflationary models of the early universe and is consistent with a flat, Euclidean universe. The CMB is the residual radiation from the Big Bang, and its anisotropies provide information about the universe's total energy density and curvature. The BOOMERanG experiment, a balloon-borne microwave telescope, provided high-resolution maps of the CMB over a significant fraction of the sky. The experiment used a focal plane array of 16 bolometric detectors cooled to 0.3 K, and achieved an angular resolution of 10 arcminutes. The data were calibrated using the CMB dipole anisotropy, which is a known feature of the CMB. The angular power spectrum of the CMB was calculated from ℓ = 50 to 600, with a peak at ℓ_peak = (197 ± 6). This peak is consistent with cold dark matter models in a flat universe. The results were compared with theoretical predictions and found to be in agreement. The data also showed that the CMB anisotropies are not contaminated by foreground emissions from interstellar dust or other astrophysical sources. The findings provide strong evidence for a flat universe and support the standard inflationary model of the early universe. The study was supported by various institutions in Italy, the USA, and the UK. The results were published in a paper available online.A Flat Universe from High-Resolution Maps of the Cosmic Microwave Background Radiation In 2000, a team of researchers led by P. de Bernardis and colleagues reported the first high-resolution maps of the Cosmic Microwave Background (CMB) radiation, revealing a peak in the angular power spectrum at multipole ℓ_peak = (197 ± 6). This finding supports inflationary models of the early universe and is consistent with a flat, Euclidean universe. The CMB is the residual radiation from the Big Bang, and its anisotropies provide information about the universe's total energy density and curvature. The BOOMERanG experiment, a balloon-borne microwave telescope, provided high-resolution maps of the CMB over a significant fraction of the sky. The experiment used a focal plane array of 16 bolometric detectors cooled to 0.3 K, and achieved an angular resolution of 10 arcminutes. The data were calibrated using the CMB dipole anisotropy, which is a known feature of the CMB. The angular power spectrum of the CMB was calculated from ℓ = 50 to 600, with a peak at ℓ_peak = (197 ± 6). This peak is consistent with cold dark matter models in a flat universe. The results were compared with theoretical predictions and found to be in agreement. The data also showed that the CMB anisotropies are not contaminated by foreground emissions from interstellar dust or other astrophysical sources. The findings provide strong evidence for a flat universe and support the standard inflationary model of the early universe. The study was supported by various institutions in Italy, the USA, and the UK. The results were published in a paper available online.