The answer is Acceleration is inward, toward the star.
The centre of mass of both the planets moves in a circular form. Since they follow circular motion, so the acceleration will be inwards, towards the star.
What is acceleration?
- The rate at which the speed and direction of a moving object vary over time.
- A point or object going straight forward is accelerated when it accelerates or decelerates.
- centripetal acceleration is the rate at which a body moves through a circle. Due to the fact that velocity is a vector quantity (i.e., it has both a magnitude, speed, and direction), as a body moves in a circle, its direction is continually changing, which causes a change in velocity, which results in acceleration.
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