Correlations of satellite positions and ring features occur in the jovian uranian and neptunian systems as well.
在木星、天王星、海王星的系统中，卫星的位置也和行星环的特性密切相关。
2
Uranian atmosphere, by composition, is 83% hydrogen, 15% helium and 2% methane although traces of other hydrocarbons have been found.
天王星大气的组成，是83%的氢，15%的氦和2%的甲烷等碳氢化合物虽然已发现的痕迹。
3
Work on Uranian rings and some general problems of the planetary rings including the collision process in the rings, the photometric theory and their origin are also elucidated.