![]() Furthermore, even the most advanced gravitational-wave detectors such as LIGO or Virgo cannot precisely identify their sources at best, they can narrow the location of a source down to an area of approximately 400 full moons in the sky. To date, however, only one visible counterpart to a gravitational-wave source has ever been detected. The telescopes can quickly scan large areas of the sky to find a source that has emitted gravitational waves detected by LIGO and Virgo. Shown in this image are the three telescopes of the BlackGEM array at ESO’s La Silla Observatory in Chile. The telescopes will scan the southern sky to hunt down the cosmic events that produce gravitational waves, such as the mergers of neutron stars and black holes. ![]() The BlackGEM array, consisting of three new telescopes located at ESO’s La Silla Observatory, has begun operations. Unlike detectors such as LIGO and the Virgo Interferometer, BlackGEM can precisely locate these astronomical phenomena using visible light, enhancing our understanding of their processes, including the formation of heavy elements like gold and platinum. The BlackGEM array, a system of three new telescopes located at the European Southern Observatory’s ( ESO) La Silla Observatory, has begun operations to detect gravitational waves caused by cosmic events like black hole and neutron star mergers. Other telescopes at the observatory are visible in the background. ![]() This photograph shows the three open domes of the BlackGEM telescopes under a stunning night sky a La Silla.
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