Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975avest...9..143l&link_type=abstract
Astronomicheskii Vestnik, vol. 9, July-Sept. 1975, p. 143-146. In Russian.
Astronomy and Astrophysics
Astronomy
Coronagraphs, Fresnel Reflectors, Solar Radiation, Venus Atmosphere, Optical Reflection, Satellite-Borne Instruments, Solar Observatories, Spaceborne Astronomy
Scientific paper
It is hypothesized that during small elongations at inferior conjunction, a substantial contribution to the radiation of Venus is made by Fresnel reflection of the sun from that planet's atmosphere. It is noted that such reflection would create a flash at earth of the order of zero magnitude. The possibility of observing this effect with ground-based and satellite-borne coronographs is considered. It is shown that a ground-based coronograph with a resolution of at least 2 sec or a satellite-borne instrument with a resolution of at least 15 sec would be required for such observations. It is suggested that a mirror reflection of the sun's image from the Venusian atmosphere could be obtained only by a spacecraft launched in the direction of Venus.-
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