Sheehan William Books

Galactic encounters
Galactic encounters

By Sheehan William

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Written by William Sheehan, a noted historian of astronomy, and Christopher J. Conselice, a professional astronomer specializing in galaxies in the early universe, this book tells the story of how...

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Planets & perception
Planets & perception

By Sheehan William

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Nature's wonderful world in rhyme
Nature's wonderful world in rhyme

By Sheehan William

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Poems about animals and nature are followed by a discussion guide for understanding the topics of the poems and for becoming aware of the need to preserve the wonders of nature.

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Worlds in the sky
Worlds in the sky

By Sheehan William

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If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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