NTT mirror being washed

The main mirror of the NTT is removed from the telescope about twice a year for cleaning. Indeed, dust accumulates over time on its surface, absorbing and diffusing some of the light that should be focused on the instrument. Cleaning this 3.56m diameter mirror is a delicate task, but the concept is simple : very soft natural sponges are used together with a very soft soap, and very clean water. The 3.6m telescope is seen in the background, and by reflection on the NTT mirror being washed.

Credit:

ESO/H.H.Heyer

Bookmark and Share

About the Image

Id:esopia-la_silla-5485
Type:Photographic
Release date:3 December 2009, 23:21
Size:4368 x 2912 px

About the Object

Name:New Technology Telescope
Type:• Unspecified : Technology : Observatory : Telescope
• X - La Silla

Image Formats

Großes JPEG
2.2 MB
Screensize JPEG
203.4 KB

Zoomable


Wallpapers

1024x768
260.2 KB
1280x1024
386.5 KB
1600x1200
520.4 KB
1920x1200
607.4 KB
2048x1536
768.8 KB

Also see our