Aerospace and Defense

Video: Cleaning a Very Large Telescope's Mirrors

14 August 2017

Source: ESOSource: ESO

How does one go about cleaning a very large telescope?

The huge mirrors of the Very Large Telescope operated by the European Southern Observatory in Chile's Atacama Desert gradually accumulate dust and other pollutants during observing sessions. These accumulations reduce the reflectivity required to capture faint light.

Maintenance entails removing the 23-ton mirrors for transport to a recoating facility, where they are cleaned and recoated with an 80 nm-thick and highly reflective layer of aluminum.

The astronomical eight-day housekeeping process is condensed in the video above.

To contact the author of this article, email sue.himmelstein@ieeeglobalspec.com


Powered by CR4, the Engineering Community

Discussion – 0 comments

By posting a comment you confirm that you have read and accept our Posting Rules and Terms of Use.
Engineering Newsletter Signup
Get the Engineering360
Stay up to date on:
Our flagship newsletter covers all the technologies engineers need for new product development across disciplines and industries.
Advertisement
Advertisement

Upcoming Events

Advertisement