The BlackGEM array and other telescopes at ESO’s La Silla Observatory

Shown in this image are the three telescopes of the BlackGEM array at ESO’s La Silla Observatory in Chile. The telescopes can quickly scan large areas of the sky to find a source that has emitted gravitational waves detected by LIGO and Virgo.

Behind the BlackGEM array are several of ESO’s telescopes, including the 3.6-metre telescope on top of the highest hill.