Read the Beforeitsnews.com story here. Advertise at Before It's News here.

By European Southern Observatory (Reporter)
Contributor profile | More stories

Story Views
Now:
Last hour:
Last 24 hours:
Total:

ESOcast 120: Chile Chill 10: VLT Main Mirror Recoating

Monday, August 7, 2017 3:44

% of readers think this story is Fact. Add your two cents.

This video takes a relaxed look at a tense process — cleaning and recoating the surface of one of the ESO Very Large Telescope’s 8.2-metre main mirrors.

Every night the huge mirrors are exposed to the atmosphere whilst uncovered during observing sessions. They gradually accumulate dust and other pollutants that reduce their reflectivity, making them less effective at capturing faint light from the cosmos. So they are regularly removed from the telescope, taken down the mountain to the recoating facility, cleaned and finally recoated with a thin and highly reflective new aluminium layer.

You can subscribe to the ESOcasts on iTunes, receive future episodes on YouTube or follow us on Vimeo.

Many other ESOcast episodes are also available.

Find out how to view and contribute subtitles to the ESOcast in multiple languages, or translate this video on YouTube.

Courtesy of European Southern Observatory

Source: http://www.eso.org/public/announcements/ann17050/

Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world.

Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.

"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.

Please Help Support BeforeitsNews by trying our Natural Health Products below!

Order by Phone at 888-809-8385 or online at https://mitocopper.com M - F 9am to 5pm EST

Order by Phone at 866-388-7003 or online at https://www.herbanomic.com M - F 9am to 5pm EST

Order by Phone at 866-388-7003 or online at https://www.herbanomics.com M - F 9am to 5pm EST

Humic & Fulvic Trace Minerals Complex - Nature's most important supplement! Vivid Dreams again!

HNEX HydroNano EXtracellular Water - Improve immune system health and reduce inflammation.

Ultimate Clinical Potency Curcumin - Natural pain relief, reduce inflammation and so much more.

MitoCopper - Bioavailable Copper destroys pathogens and gives you more energy. (See Blood Video)

Oxy Powder - Natural Colon Cleanser! Cleans out toxic buildup with oxygen!

Nascent Iodine - Promotes detoxification, mental focus and thyroid health.

Smart Meter Cover - Reduces Smart Meter radiation by 96%! (See Video).

Comments

Online:
Visits:	1,599,084,923
Stories:	8,137,967