The largest gamma-ray telescope ever built started operation in Namibia on July 26.

The largest Cherenkov telescope, the telescope through which gamma-rays can be seen, has 28-meter-sized mirror.

Together with the four smaller (12 meter) telescopes, the H.E.S.S. (“High Energy Stereoscopic System”) observatory will allow deeper understanding of known high-energy cosmic sources, Phys.Org website reports.

The telescope structure and its drive system were designed by engineers in Germany and South Africa, and produced in Namibia and Germany. The 875 hexagonal mirror facets which make up the huge reflector were manufactured in Armenia, and individually characterized in Germany.