Articles tagged with "paranal"

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Bad weather at Paranal

Monday, April 9th, 2012 | Chile | 24°37' S, 70°24' W
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This photo on flickr
Bad weather at Paranal

I’m at Paranal right now, undergoing my final training before they let me fly solo at the controls of the world’s premier optical observatory. My training so far has been seriously affected by weather – of the 11 nights I’ve done, five have been completely lost and most of the rest have been partly lost. Last night the telescopes were closed a couple of hours early, and tonight we didn’t open at all. The telescopes have to be closed when the humidity goes above 60%, and tonight it was nearly 100% and there were clouds right on the peak.

Before the clouds came in, though, I went out to take a photo of the night sky. The moon was rising, and Orion was setting. When I took the photo, I couldn’t see the shadow the moon was casting, so I was pretty amazed when I looked at the camera screen to see the shadow of the telescopes, cast on to the clouds below.

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Desert rains

Friday, April 13th, 2012 | Chile | 24°38' S, 70°23' W
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Desert rains

After four nights of this shift, one had been completely lost and three partially lost to bad weather. The fifth was my first night as a trained night astronomer. Crunch time. Would I mess it up? Would I break the telescope? Fortunately it turned out I wouldn’t, because the night was also completely lost, with thick clouds and high humidity ruining any chance of doing any astronomy. I was slightly relieved.

I went out on to the telescope platform a few times. Lightning was flickering some way inland, but I assumed the storm would not come out our way. Since I moved to Chile in September 2011, I had hardly seen any rain at all. There was an evening of drizzle in October, and I felt a few spots, literally no more than 10 or so, in January. Otherwise, nothing, and my English soul was in need of watering. But up here in the Atacama, I didn’t think it was going to get any. So when I went out on to the platform again at 5am and actually felt spots of rain, I didn’t really believe it was rain. I just thought it was extreme humidity.

We gave up a couple of hours before dawn when it was obvious the weather wasn’t going to improve. I went to bed at about 7am. Then, at 9am, I was woken up by thunder. Blearily I got to my feet. Thunder? Surely not? And what was this sound, something like rain battering on the window. In disbelief I rolled up the blind and saw that it was true – an epic downpour was in progress. Still half asleep, I went out into the corridor of the residencia and found rain pouring through the roof. The building appears not to be even slightly waterproof.

I was just stunned. I hadn’t expected to see anything like this here in the driest desert on Earth. They tell me it does rain here, sometimes, but the last time had been only eight months ago. I’d thought, during the long dry summer, that when I did finally experience rain again, I might go out and stand in it and enjoy it. But after two hours sleep I was so tired that I just went back to bed, and slept through the rest of the storm once the thunder had stopped.

For a couple of days afterwards, water was still dripping through the ceiling.

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After the rain

Saturday, April 14th, 2012 | Chile | 24°37' S, 70°24' W
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After the rain

After my interrupted sleep I wasn’t looking forward to my first night unsupervised at the controls, but in the end it was postponed again. Early the next afternoon the decision was taken that the telescopes would not open at all that night, to avoid any possibility of water getting in. The “domes” have flat tops and any standing water could spell disaster for all the sensitive mechanics and electronics.

So we went up to the control room anyway but no astronomy would be done tonight. It was a pity, because the skies after the storm were stunningly clear. With the luxury of having no observatory work to do, I went out on the platform late in the night to appreciate the view.

I moved here in October, at which time the centre of the Milky Way is setting and can’t be seen very well. Now, for the first time, I got a good look at it. It’s stunningly bright and you can only see it well from the Southern Hemisphere. This is a real shame for the 90% of the world’s population who live in the Northern Hemisphere – their view of our home galaxy is completely inadequate in comparison. I hadn’t really seen it properly since I was in Zambia, 11 years ago. So I was really happy to see it again tonight, rising behind the telescopes in the small hours. It will be visible for the next few months, and I will be taking a lot more photographs of it.

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Clouds over Paranal

Tuesday, October 22nd, 2013 | Chile 2013 | 24°37' S, 70°24' W
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Clouds over Paranal