Author/Authors :
Sلnchez-Lavega، نويسنده , , A. and Pérez-Hoyos، نويسنده , , S. and Acarreta، نويسنده , , J.R. and French، نويسنده , , R.G.، نويسنده ,
Abstract :
Hubble Space Telescope (HST) images (1997–2002) do not show a hexagonal wave in the south pole that is a counterpart of the northern one (D. A. Godfrey 1988, Icarus76, 335–356). However, a polar jet similar to that in which the north polar hexagonal wave is embedded has been discovered in the southern hemisphere. The HST images also reveal the existence of a small polar “cap” about 2000 km in diameter that marks the rotational pole of the planet, as well as unexpected changes in the nearby cloud structure on a timescale of years.
