Understanding Object Movement in Space: Factors Affecting Speed Between Galaxies

[Evilinside]

I wanted know how objects move through space, say in between galaxies furtherest from a gravitational field. I was wondering why is it that they don't move at extremely high speeds. If these objects have almost no forces acting of them or more importantly no means of resistance, then what prevents them from moving at high speeds. Will mass resist motion even in this situation?

 

[Doc Al]

Newton's 1st law applies. Without an external force, an object will keep moving in a straight line at whatever speed it happens to have. Mass resists changes in motion.

 

[Dr.Brain]

Generally , bodies in Universe do move at high speeds given the great gravitational influences they are surrounded by. Bodies far from Gravitational influences will experiences minute forces which wont accelerate them much , so they continue with the velocities they had when they must have left some strong Gravitational influence.

BJ