Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.307..222a&link_type=abstract
Nature (ISSN 0028-0836), vol. 307, Jan. 19, 1984, p. 222-224.
Astronomy and Astrophysics
Astronomy
98
Infrared Astronomy, Infrared Spectra, Venus Clouds, Infrared Imagery, Planetary Rotation, Radiative Transfer, Venus, Clouds, Structure, Dark Side, Observations, Infrared, Wavelengths, Anomalies, Brightness, Patterns, Periods, Rotation, Procedure, Spectra, Radiation
Scientific paper
Observations of the dark side of Venus at infrared wavelengths between 1.5 and 2.5 microns are reported which show the dark side to be anomalously bright in portions of this waveband, and to exhibit structured cloud patterns whose rotation period is longer than that of any other clouds. The observational procedures are described, and the spectrum of the radiation is shown and discussed in terms of the path length of radiation through the atmosphere. The nature of the clouds is discussed, and it is concluded that the clouds responsible for the dark-side modulation lie below (or perhaps within) the uppermost cloud layer. They must have an origin distinct from that of the atmospheric UV features.
Allen David A.
Crawford J. W.
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