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" ... The ALMA antennas are the most precise antennas ever built. Their impressive characteristics enable ... [+] them to capture radio waves that travel billions of light-years (from around the time of the Big Bang!) This image shows an antenna with a 12-meter diameter, with its aluminum panels pointing the captured light towards the subreflector, where the signals are concentrated and redirected towards the center of the parabola to reach the antenna receivers. Ⓒ ALMA (ESO/NAOJ/NRAO) ... "