Not even our mirrors stay clean forever! 🧽
Optical engineer Jaime González is checking for large particles on a VLT mirror. This step is part of a periodic cleaning process that keeps the mirrors ultra-precise & super-reflective.
Find out how this is done: https://www.eso.org/public/images/potw2539a/
And for a deeper dive: https://www.eso.org/public/blog/exploding-snow/
📷 ESO/N. Schafer
#astrodon #astronomy #astrophysics #space #science #engineering #technology