Salpeter E W Edwin Walter (1 results)
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Language: English
Published by Vatican Observatory (Specola Vaticana), Vatican City, Italy, 1964
- Softcover
- First Edition
Seller: Dorley House Books, Inc., Hagerstown, MD, U.S.A.Dorley House Books, Inc.
Contact seller4-star sellerCondition: Used - Very good
US$ 400.00
US$ 8.65 shippingShips within U.S.A.Quantity: 1 available
Add to basketPaperback. Condition: Very Good. 1st Edition. stapled blue printed wraps; 8 clean, unmarked pages; with 16 photographic plates (loose); both in a quatro-folded slipcase; lite sunning but very little wear mostly of which is at the seams/hinges of the slipcase; owner's name on slipcase and booklet. a landmark spectral atlas and ca…talog published by the Vatican Observatory detailing the atomic emission wavelengths (measured in Angströms, of the element thorium. It serves as a highly accurate, universal reference standard for calibrating astronomical spectrographs and laboratory equipment. Because thorium is mono-isotopic and avoids complex hyperfine line splitting, its spectrum produces clean reference points critical for precise astronomical radial velocity and exoplanet searches. 16 b/w photograhic plates, each with three sections of the spectrum. (illustrator).
