I took this pic a while back at ESO's Paranal Observatory in Chile. It shows the four Auxiliary Telescopes of the VLT Interferometer, gazing up to the sky. These telescopes work together, achieving a spatial resolution similar to that of a massive telescope as large as the separation between them.

Curious about how this works? Check out our interferometry explainer: https://www.eso.org/public/teles-instr/technology/interferometry/

#astrodon #astronomy #astrophotography