Light does not require a constant force to keep it moving. According to our current understanding of physics, light travels through space as electromagnetic waves, and these waves propagate without the need for a medium or external force to sustain their motion.
In a vacuum, such as outer space, light moves at a constant speed of approximately 299,792 kilometers per second (or about 186,282 miles per second) denoted as "c." This speed is often referred to as the speed of light. In this context, "c" represents the maximum speed at which information or causality can propagate in the universe.
The movement of light is governed by the principles of electromagnetism, specifically Maxwell's equations, which describe the behavior of electromagnetic waves. These waves consist of oscillating electric and magnetic fields that support each other and propagate through space.
To summarize, light moves on its own through space without requiring a constant force to sustain its motion.