Titlebook: Night Has a Thousand Eyes; A Naked-Eye Guide to Arthur Upgren Book 1998 Springer Science+Business Media New York 1998 astronomy.physics.sky

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In Praise of Twilightf day into night. These lines could describe the fading light of an overcast autumnal English afternoon, or they could apply equally well to a clear summer evening just before sunset, when the shadows lengthen and stretch across lawns and over hedge and furrow. The changes occurring over the next ho

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The Summer Sky and the System of Stellar Magnitudes always visible whenever the night sky is clear. But any glance at the rest of the heavens, at any time of year, will reveal one very significant fact: None of the brightest stars are in the north. No matter what the month or season, the brightest stars are found in the rest of the sky—the large par

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