Abstract
ON April 26, 1955, the moon's position was favourable for the observation from England of the passage of the moon across the large-diameter radio source in the constellation of Gemini. This radio source, No. 2C.537 of the Cambridge survey1, having R.A. 06h. 13m. 37s. and Dec. 22° 38′ (1950.0), has been identified by Baldwin and Dewhirst2 as the galactic nebulosity IC.443, photographs of which, taken with the 48-in. Schmidt camera, at Palomar, reveal a filamentary structure contained within a circular region of 24.5′ radius.
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References
Shakeshaft, J. R., Ryle, M., Baldwin, J. E., Elsmore, B., and Thomson, J. H., Mem. Roy. Astro. Soc. [67, 106 (1955) ].
Baldwin, J. E., and Dewhirst, D. W., Nature, 173, 164 (1954).
Link, F., and Neuzil, L., Bull. Astro. Czech., 5, 112 (1954).
Ryle, M., and Hewish, A., Mem. Roy. Astro. Soc. [67, 97 (1955) ].
Link, F., private communication, to be published in Bull. Astro. Czech.
Dollfus, A., C.R. Acad. Sci., Paris, 234, 2046 (1952).
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ELSMORE, B., WHITFIELD, G. Lunar Occultation of a Radio Star and the Derivation of an Upper Limit for the Density of the Lunar Atmosphere. Nature 176, 457–458 (1955). https://doi.org/10.1038/176457a0
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DOI: https://doi.org/10.1038/176457a0
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