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- W4231284142 abstract "IN 1896 Prof. E. C. Pickering discovered a series of lines in the spectrum of the star ζ Puppis which has been attributed to hydrogen in consequence of numerical relationship to the Balmer series ordinarily observed in laboratory experiments. From analogy with other spectra, Rydberg further calculated the positions of lines which Would constitute the Principal series of hydrogen, and the first line, at 4687.88, has been identified with a line appearing in stars, of the fifth type. The ζ Puppis lines have since been observed in the spectra of a few other stars, and because they had not been found in the terrestrial spectrum of hydrogen, even under the most promising conditions, they have commonly been considered to represent a modified form of hydrogen which could only be produced at very high temperatures. Hence, Sir Norman Lockyer gave the name “proto-hydrogen” to the gas which produces the lines in question, while others have called it “cosmic” hydrogen." @default.
- W4231284142 created "2022-05-12" @default.
- W4231284142 date "1912-12-01" @default.
- W4231284142 modified "2023-09-25" @default.
- W4231284142 title "New Hydrogen Spectra" @default.
- W4231284142 doi "https://doi.org/10.1038/090466a0" @default.
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