WHEN I WAS A KID growing up out in the country, I loved the stars. I knew that the night sky was not just a dome overhead but an effectively endless space, with celestial lights distributed at many different distances. To enhance that perception, I would lie down on the front lawn to stargaze. I'd point my head north and my feet south and imagine that I was hanging on the edge of the planet, like a refrigerator magnet, looking out horizontally into infinity. I'd even dig my fingers and toes into the grass to keep from falling off into the sky.
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