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The lake was now at last a mirror, but I noticed that it was not so everywhere. Even though there was no moon, I could see rough spots in the glass that could not reflect the pinpoint stars, but did reflect the general starlight averaged from everywhere overhead. These patches would grow and shrink and drift across the lake as tiny breaths of air would tickle the surface into wavelets. I wondered what this effect was having on my long exposures of this scene. I worried that the air motions would get larger, maybe engulfing the entire lake with the frosted appearance. Eventually the tiny puffs of air became a tiny but steady flow, and I watched the glass of the lake become frosted everywhere. The breeze, however light, also registered on my skin the distinct temperature drop that had occurred while I was busy tending cameras and telescopes through the night. The core of the Milky Way had set, with new replacement stars arriving from the east. I was seeing a future season of stargazing above me, and it was now time to pack up and go home.
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