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At observatories worldwide most of the glory goes to the astronomers who provide us with new vistas of the heavens,

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but this is only possible thanks to the many experienced technicians and engineers

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who accomplish amazing work behind the scenes.

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They work against the clock to ensure that the telescopes function optimally to deliver outstanding results.

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But what does an engineer at ESO’s Very Large Telescope actually do?

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This is the ESOcast!

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Cutting-edge science and life behind the scenes of ESO, the European Southern Observatory.

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Exploring the Universe’s ultimate frontier with our host Dr J, a.k.a. Dr Joe Liske.

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Welcome to another episode of the ESOcast.

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The completion of ESO’s Very Large Telescope in the year 2000 was not only an amazing scientific achievement,

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but it was also a technological triumph.

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The VLT at Mount Paranal is the world´s most advanced ground-based optical telescope

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and it attracts astronomers from all over the world.

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But this complex, high-tech facility can only function because of the dedication of the Paranal Engineering Department.

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Highly skilled VLT engineers, like Roberto Castillo, work with unsurpassed precision against the clock

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to make sure that every single piece of high-tech machinery works perfectly.

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Let us now dive into an exciting day in the life of a VLT engineer.

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Roberto Castillo works in the VLT instrument team.

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He is responsible for part of the VLT instruments and, as Unit Telescope Manager,

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he is in charge of handing over one of the four giant 8.2-metre telescopes to the astronomers at the beginning of each night.

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First stop: the office.

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Roberto checks on the workload and identifies the most critical issues that must be dealt with.

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He interacts closely with colleagues and scientists who wish to have some of the instruments checked during that afternoon.

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The countdown has begun.

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All problems must be solved before sunset...

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Although this might seem a job like any other,

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the extreme complexity of the VLT presents a Paranal engineer with a variety of challenging tasks

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each of which must be performed quickly and with supreme precision.

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What’s going on? Roberto’s on the radio...

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Paranal, we have a problem…

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I'll go to the telescope to check the instrument.

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The problem must be solved.

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Roberto leaves his office and crosses the platform. Problems usually don’t come alone.

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On his way to the telescope, Roberto interacts with his colleagues and checks some components.

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Each of the four giant VLT telescopes is equipped with several extremely powerful yet very delicate instruments.

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An engineer at Paranal must have a specialised knowledge of all the components in case of technical malfunctions,

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to ensure that the VLT is ready for observations every day,

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and “downtime” due to technical problems is kept to a minimum.

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As sunset slowly approaches, Roberto’s already engaged with his next important activity:

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the daily coordination meeting in the control building.

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This is where all the scientists and engineers get together

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to report on all the important issues encountered during the day and to prepare for the night.

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For Roberto, this moment is especially crucial.

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As a Unit Telescope Manager, he’s responsible for handing over the telescope

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in perfect shape to the astronomers for the night.

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Let’s follow him as time ticks away.

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Each minute becomes even more precious as sunset draws near.

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Roberto rushes to his telescope to initiate the standard start-up sequence.

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The telescope can be handed over to operations only when every single task in his checklist is complete.

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This moment is the culmination of all of Roberto’s hard work,

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and with smooth and precise commands, the steel and glass giant gently awakes.

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The Sun has now completely set. This is the moment of truth.

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Roberto is now able to say the magic words to the telescope operator:

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Attention, UT2 operator...

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Go ahead...

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The telescope is ready for you.

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So, this finally marks the end of Roberto’s challenging workday.

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The astronomers now take control of the VLT, and the telescope will soon come to life.

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As night falls over Paranal, and as the celestial display takes the front seat,

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Roberto is heading back to the Residencia to enjoy a relaxing dinner with his colleagues.

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Although his day is officially over, Roberto must remain reachable and prepared to react swiftly

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in case a problem should arise at the VLT during the night.

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Behind every great astronomer stands a great engineer.

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This is Dr J signing off for the ESOcast. 

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Join me again next time for another cosmic adventure.

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ESOcast is produced by ESO, the European Southern Observatory. www.eso.org

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ESO, the European Southern Observatory, is the pre-eminent intergovernmental science and technology organisation in astronomy

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designing, constructing and operating the world's most advanced ground-based telescopes.

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Transcription by ESO ; translation by —