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From our window in Isleworth, we see across a forested island in the Thames to another line of trees, beyond which Continue reading “The other royal observatory”
Guy Ottewell's website and weblog
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From our window in Isleworth, we see across a forested island in the Thames to another line of trees, beyond which Continue reading “The other royal observatory”
Device One was the portable flexible planisphere, which I wanted to call the Star Hat Continue reading “More devices: the Star Bottle and others”
This line