Neptune's wind speeds obtained by tracking clouds in Voyager images

Details Neptune's wind speeds obtained by tracking clouds in Voyager images Neptune's wind speeds obtained by tracking clouds in Voyager images

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989sci...245.1367h&link_type=abstract

Science (ISSN 0036-8075), vol. 245, Sept. 22, 1989, p. 1367-1369.

Astronomy and Astrophysics

Astronomy

33

Clouds, Neptune Atmosphere, Radio Astronomy, Satellite Imagery, Wind Velocity, Planetary Rotation, Solar Energy, Voyager 2 Spacecraft, Neptune, Winds, Velocity, Clouds, Spacecraft Observations, Techniques, Voyager 2 Mission, Imagery, Period, Rotation, Atmosphere, Meteorology, Circulation, Earth-Based Observations, Features, Latitude, Longitude, Procedure, Comparisons

Scientific paper

Images of Neptune obtained by the narrow-angle camera of the Voyager 2 spacecraft reveal large-scale cloud features that persist for several months or longer. The features' periods of rotation about the planetary axis range from 15.8 to 18.4 hours. The atmosphere equatorward of -53 deg rotates with periods longer than the 16.05-hour period deduced from Voyager's planetary radio astronomy experiment (presumably the planet's internal rotation period). The wind speeds computed with respect to this radio period range from 20 meters per second eastward to 325 meters per second westward. Thus, the cloud-top wind speeds are roughly the same for all the planets ranging from Venus to Neptune, even though the solar energy inputs to the atmospheres vary by a factor of 1000.

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