Day 281… it was already below zero as we headed to the summit of the mountain. Every now and then we’d catch a glimpse through the trees of the light, spurring us on to the top. And when we arrived, we chipped away the frost and dodged the snow to set up our tripods, drawn to the light like so many moths…

This is Spectra. It shoots straight up for twelve kilometres. It goes higher than commercial airliners. You can see it from almost a hundred kilometres away. Or at least you could – it’s just been turned off. Permanently.  So where do the moths go now?

(David, how did yours turn out?)