Accession Number : AD0656307

Title :   THE TWILIGHT ATMOSPHERE OF VENUS,

Corporate Author : RAND CORP SANTA MONICA CALIF

Personal Author(s) : Schilling,G. F. ; Moore,R. C.

Report Date : JUL 1967

Pagination or Media Count : 97

Abstract : An investigation of the discrepancies between the theoretically predicted and the actually observed shape and periodic appearance of Venus. Current astronomical methods of observation of the twilight sky of Venus are investigated by combining a rigorous celestial geometry with a determination of the physical effects exerted by the relative luminances of the atmospheres of Venus and the Earth. Analysis shows that the discrepancy between the expected and observed times of dichotomy corresponds to a range in position angle from about 92 to 98 degrees, which implies a minimum height of the effectively scattering atmosphere from 13 to 23 km. There are indications that the true height may be several tens of kilometers.

Descriptors :   (*VENUS(PLANET), TWILIGHT), (*PLANETARY ATMOSPHERES, VENUS(PLANET)), ANOMALIES, CLOUD COVER, SCATTERING, OPTICAL PROPERTIES, BRIGHTNESS, GEOMETRY, PREDICTIONS, SKY BRIGHTNESS, MATHEMATICAL ANALYSIS, ATMOSPHERE MODELS

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE