A planet in an elliptical (oval) orbit will move faster as it gets to its closest point to its sun, and slow down as it reaches its furthest point. A planet with a truly circular orbit will have a constant speed.
The Sun doesn't move fast, but if you mean which planet moves fast around the sun then it would be Mercury, because it is closer.
Near the Sun the force of gravity is very strong so the planet has more energy which means it has to move faster.
That would be Mercury. Venus also has no moons, but does not move as fast as Mercury.
The Mars rovers move at a slow walking pace.
Fast, Slow, Very Slow and Dead
Move fast.
In water fast, on land their slow.
slow
fast
fast
Jaguars move slow to catch their pray,jaguars move fast to catch up with their pray.
The armodillo moves in between fast and slow
Depends on what you think is fast and slow!
fast as lightning
It Moves fast.
it moves fast
Electrons do not move fast.