$4.$ The Voyager $2$ satellite is one of the furthest man$-$made objects from the sun $$ as of $2018,$ it has now passed beyond the edge of the solar system and is moving through interstellar space. The satellite has an approximate mass of $800$ kg and is currently moving at a speed of about $1,500$ m$/$s in the general direction of the star Sirius. The satellite$$s closest approach to Sirius will take place in $296,000$ years. How much force will the engines of the satellite need to exert during this very long time to keep Voyager $2$ moving along its current trajectory while maintaining its current speed? Explain your answer.