Is there friction in space, and if so, how does it affect the movement of objects in the vacuum of space?

Yes, there is some friction in space, known as "interstellar medium" or "space dust." This friction can affect the movement of objects in space by gradually slowing them down over time, especially for spacecraft traveling at high speeds. However, the impact of this friction is minimal compared to the effects of gravity and inertia in the vacuum of space.