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On the presence of cosmic dust in the upper atmosphere |
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| Authors: | F Link |
| Institution: | Institut d''Astrophysique, Paris, France |
| Abstract: | The activity of Librids on 4 April 1973 was detected by the rise of the twilight luminosity. The ratio of circumzenithal luminosity in the antisolar to solar azimuth also increases in the presence of cosmic dust in the upper atmosphere. |
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