Physics
Scientific paper
Dec 1922
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1922natur.110q.769r&link_type=abstract
Nature, Volume 110, Issue 2771, pp. 769 (1922).
Physics
Scientific paper
I HAVE now succeeded in obtaining a spectrogram showing the general features of the spectrum of the night sky in the south of England, with the moon below the horizon. The exposure given was about 50 hours, beginning each night not earlier than 2½ hours after sunset, and closing about midnight. There appears, therefore, to be no possibility that sunlight or moonlight intervened.
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