thanks, two minute video:
The southern polar vortex on Venus
http://www.youtube.com/watch?v=ELAMuu5ivaY
First video:
Date: 07 Apr 2011
Satellite: Venus Express
Depicts: South Pole of Venus
Copyright: ESA/VIRTIS-VenusX/INAF-IASF/LESIA-Obs. Paris/Univ. Lisbon/Univ. Evora (D. Luz, Univ. Lisbon & D. Berry, Univ. Evora)
This animation is a reconstruction of the motion of the polar atmosphere of Venus, created by taking 3.8 micron radiance maps of the polar region, obtained during May 2007, and applying a shift (a rotation and translation) to the image based on the measured wind speeds.
The cross marks the South Pole and the white circle marks the centre of rotation of the polar atmospheric vortex. The outer edge of the figure is the latitude circle of 75 degrees.
Second video:
Date: 07 Apr 2011
Satellite: Venus Express
Depicts: Southern polar vortex on Venus
Copyright: ESA/VIRTIS-VenusX/INAF-IASF/LESIA-Obs. de Paris (G. Piccioni, INAF-IASF)
This image sequence shows thermal infrared radiation (at a wavelength of 3.8 microns) emitted by the cloud-tops at the southern polar region of Venus, as viewed by the VIRTIS imaging spectrometer on Venus Express. The scale has been inverted: white regions show cooler cloud, likely to be at higher altitude.
Related article: http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=48596
Video Editing: Marco De Marco
thanks FN!