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Clouds over Paranal

Tuesday, October 22nd 2013

We finished our epic Chile journey with a visit to Paranal where I spend 80 nights a year working at the telescopes. We had some bad luck though. The skies are normally clear here at least 90 per cent of the time, but the last couple of years have seen quite a lot of bad weather, and today we managed to pick a cloudy day. We'd seen the cirrus over the desert as we headed out from Antofagasta, but there is quite often cloud nearer to Antofagasta while Paranal is clear. Today it was not so, and the clouds thickened during the afternoon.

By nightfall they'd decided not to open the telescopes. The opening is always impressive to see, so this was a pity, but the engineer who would have opened the dome treated us to a good display anyway, tilting and rotating the telescope so that we got great views of it inside the closed dome.

We went out onto the platform in the night, and through breaks in the clouds we could see stars, but nothing like the normal blazing skies. It was a pity, as I'd planned the trip for a time when there would be no moon and the centre of the Milky Way would be high in the sky at the start of the night. The night before, and the night after, there wasn't a cloud in the sky.

But Paranal is not only about the night skies. We went for a walk in the desert the next day, and that's always great. The terrain here is so harsh that just before we arrived, they'd been testing a Mars rover nearby.

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