Some of them is the indus river and nile river and the Ohio river hope this helped and please gives points
Answer:
The diameter of the Milky Way is 3,503,974,249,104 km times larger than the diameter of Saturn's rings.
Explanation:
1 light year is the distance light can travel in one year. One light year is equal to exactly to 9,460,730,472,580.8 km.
Therefore the diameter of the milky way in distance is 9,460,730,472,580.8 x
km while the diameter of Saturn rings are about 270,000km.
Comparing both diameters

= 
= 3,503,974,249,104 km
The scale gives the ratio that compares the measurements of the drawing or model to the measurements of the real object. Scale factor is a scale written as a ratio without units in simplest from.
Answer:
How long does it have to be ?