Abstract
AURORA AT A HEIGHT OF 500 KM.—The careful auroral observations made in Norway and Sweden have established the remarkable fact that some of the streamers extend to the height of 500 km. above the earth' surface. This presumably implies that there is a certain amount of atmosphere at that height, which is a conclusion of cosmical importance.
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Our Astronomical Column. Nature 107, 663 (1921). https://doi.org/10.1038/107663a0
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DOI: https://doi.org/10.1038/107663a0