In cloud without end
2009 December 12
I’m in La Palma this week, for an observing run using the Planetary Nebula Spectrograph on the William Herschel Telescope. Unfortunately the weather is terrible, and looks like it might stay that way for the next few days. We’ve got six nights though, so hopefully we will leave the mountain with at least some data.
Changing the filter on the PN.S instrument.
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