The world's longest river system is the Nile-Kagera River system that flows in eastern Africa. There is some suggestion that the Amazon-Ucayali-Apurimac system in South America may be the largest.
Neptune.
It can be considered one of the 10 longest by itself, and the Ob-Irtysh combination is arguably the 7th longest river system in the world, the fourth-longest in Asia.
(The year is proportional to the distance to the power 1.5) In our solar system, Mercury has the shortest year. Neptune has the longest.
The Rio Grande is the longest Mexican river.
Look on a map. The longest is the Mississippi/Missouri river system.
Columbia River
The longest river in the US is the Missouri River that is 2,341 mi/3,768 km long.
The Murray River of Australia is the longest river in Oceania.Many websites will incorrectly state that the longest river is the Murray-Darling but this is not a river. These are two separate rivers (the Murray and the Darling) which form part of a vast river system known as the Murray-Darling river system.
Congo River System
The Great Red Spot
Everlasting cyclone in Saturn. Longest lasting and one of the largest cyclone in the solar system.
Neptune takes the longest
The world's longest river system is the Nile-Kagera River system that flows in eastern Africa. There is some suggestion that the Amazon-Ucayali-Apurimac system in South America may be the largest.
The Mackenzie River is the largest river system in Canada.
Mississippi river
Mississippi-Missouri river system