Titlebook: Comets in the Post-Halley Era; In Part Based on Rev R. L. Newburn,M. Neugebauer,J. Rahe Book 1991 Springer Science+Business Media Dordrecht

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Erik S. Anderson,Jennifer Avegnofor example, by the many new spectral features detected in the infrared. The techniques of photometry, imaging, and spectroscopy are reviewed in this chapter and their status at the time of the Halley observations is described.

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India Studies in Business and Economics photons can account for the 3.4-.m emission feature. The band resembles (but is not identical to) bands of carbonaceous chondrite organic material, synthetic materials, and interstellar carbonaceous bands. Direct connections among these materials are possible, but have not been established.

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