Ascientist discovers a new planet. she notices that the planet has alternating bands in the atmosphere that all flow in the same direction. what can she assume about the planet?

The scientist may assume that the planet might be a gas giant.The scientist can make this assumption because the phenomenon is observed in the solar system. Jupiter, Saturn, Neptune and Uranus are gas giants in our solar system. Jupiter and Saturn show the characteristic of having alternating bands in the atmosphere that flow in the same direction. 

Rain is pulled by gravity which is a non contact force