First-ever picture of a black hole | Max-Planck-Gesellschaft
Very Long Baseline Interferometry (VLBI) is the name of this technique, in which the signals of the individual antennas are superimposed. This synchronization takes place with the aid of high-precision atomic clocks accurate to the nanosecond. An extreme angular resolution of less than 20 micro arc seconds can be achieved; if our eyes had such a power, we could see the individual molecules in our hands.
The network of this so-called Event Horizon Telescope (EHT) included the 30-meter IRAM mirror in Spain and the APEX telescope in Chile, in which the Max Planck Institute for Radio Astronomy is involved. In 2017 alone, the telescopes recorded a total of about four petabytes of data - such a large amount that postal transport is actually faster and more efficient than sending the data via the Internet.
Pour plus de précisions sur la mise au point technique de l’EHT, voir aussi : ▻https://www.mpg.de/13326245/interview-anton-zensus-max-planck-eht?c=2249