Where is the barycenter of a star-planet system generally located due to the star's dominance in mass?
Answer
Very close to, or even inside, the star itself
In any gravitationally bound system involving a star and one or more planets, both bodies orbit their common center of mass, known as the barycenter. Because stars are overwhelmingly more massive than any known planets—often by factors of thousands or more—the barycenter is located extremely near the center of the star. In many cases, this center of mass falls physically within the boundaries of the star itself. Consequently, the star undergoes only a minute, elliptical positional shift around this central point dictated by the orbiting companion.
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