Salpeter e w edwin walter (1 résultats)
Autres imagesLangue : anglais
Edité par Vatican Observatory (Specola Vaticana), Vatican City, Italy, 1964
- Couverture souple
- Édition originale
Vendeur : Dorley House Books, Inc., Hagerstown, MD, Etats-UnisDorley House Books, Inc.
Contacter le vendeurVendeur avec une évaluation de 4 étoilesEtat: Occasion - Assez bon
EUR 357,39
EUR 7,50 expéditionExpédition nationale : Etats-UnisQuantité disponible : 1 disponible(s)
Ajouter au panierPaperback. Etat : 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 catalo…g 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. (illustrateur).
