Astronomical Spectrographs And Their History By John Hearnshaw

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Consciousness Emerges: Somewhere along a tangled path, sights, sounds and insights pop into awareness
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Astronomical Spectrographs and their History

By John Hearnshaw

May 23rd, 2009; Vol.175 #11 (p. 35)

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Astronomical Spectrographs and their History by John Hearnshaw

Astronomers have used these instruments to explore the heavens since the 19th century.

Cambridge Univ., 2009, 240 p., $140.

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