Astronomers used to detect them by indirect methods, such as picking up a small wobble in the position of the star that indicated it was being pulled very slightly towards an orbiting planet.
Astronomers used to detect them by indirect methods, such as picking up a small wobble in the position of the star that indicated it was being pulled very slightly towards an orbiting planet.
天文学家过去常用间接方法探测这类物体，如在恒星周围某一点，探测到一丝“抖动”，这表明围绕恒星运转的行星正将其轻轻拉走。