On 5 October 2012, the European Southern Observatory (ESO) will broadcast A Day in the Life of ESO, a free, live event on the web, as part of its 50th anniversary celebrations.

There will be live observations from ESO's flagship observatory, the Very Large Telescope (VLT), on Cerro Paranal in Chile's Atacama Desert, as well as fascinating talks from astronomers at ESO's headquarters in Germany.

Members of the public are invited to ask questions in advance of the event, or during the stream, by Facebook, Twitter, and email.

For the first time in ESO's history, the VLT will be pointed towards an object in the sky selected by members of the public - the Thor's Helmet Nebula (NGC 2359).

This striking nebula was selected as part of the Choose What the VLT Observes competition. Brigitte Bailleul, from France, won the Tweet Your Way to the VLT! competition, and will travel to the Paranal Observatory in Chile to help make the observations.

The live link to Paranal will show the observations and the telescopes on the mountaintop, in the stunning landscape of the Atacama Desert, letting viewers join Brigitte on her trip of a lifetime.

The webcast will be streamed free of charge through Livestream, and anyone may view it simply by visiting ESO's Livestream page. By creating a free Livestream account, and following ESO, viewers will receive updates and reminders for this and future Livestream events from ESO.

Furthermore, venues across ESO's Member States and beyond are hosting public events on 5 October, with a wide range of local activities supplementing the webcast. A list of ESO 50th Anniversary event venues is available online.

The webcast will run from 11:00 to 17:00 (CEST) on 5 October. It will be hosted by ESO astronomer - and host of the ESOcasts - Dr. J (Dr. Joe Liske).

In addition to the live link to the Paranal Observatory in Chile, there will be talks from astronomers at ESO's headquarters in Germany, on topics ranging from ESO's state-of-the-art telescopes, via the latest news from the frontiers of astronomy, to what the life of an astronomer is like.

Chapters from ESO's anniversary movie, Europe to the Stars, will also be shown. Throughout the day there will be question and answer sessions, and the chance to test your ESO knowledge in a quiz to win some astronomical prizes!

This webcast gives viewers a unique opportunity to see inside the world's most productive ground-based astronomical observatory, as we celebrate ESO's first 50 years of exploring the southern sky.