faster nearer to the sun, the sun has more pull to move it faster
Tsunamis are the slowest and most dangerous waves. They can travel at high speeds over open ocean but slow down and increase in height as they reach shallow waters near the coast, resulting in destructive flooding.
From the Pewter Moon (X-56 Y-52) , travel up and right to reach the fire planet at X-83 Y-20. When you are near the planet, click on it to land. (see related question)
mars
Contact
The river flows the fastest in the middle of the river.
Near the surface
That is because it is so near to the sun. For more details, you will need to study Kepler's laws of planetary motion.
Titan orbits the planet Saturn.
Mercury
Earth
Mercury is the 1st planet and therefore the nearest to the sun.
Venus is the second planet out from the sun.