Here's why:
* No Air Resistance: In the vacuum of space, there's no air resistance to slow the ball down or change its direction.
* No Gravity (or Negligible Gravity): While there is always some gravitational pull from nearby celestial bodies, in the vastness of space, the force of gravity can be extremely weak. This means there's no significant force pulling the ball towards anything.
In essence: Once the ball is thrown, it will continue moving in the same direction and at the same speed forever unless acted upon by an external force.
Important Note: Even in space, objects like planets, stars, and galaxies have gravitational influence. If the ball is close enough to one of these objects, its path would eventually curve as it gets pulled towards the object's gravitational center.
