The Cassini orbiter and Huygens probe together form one of the biggest and heaviest planetary spacecraft ever built, with 12 scientific instruments on the orbiter and six on the probe [see inset in box on page 62].

• 卡西尼号轨道船加上惠更斯号探测器，构成了有史以来最大且最重的行星太空船之一，轨道船上载有12具科学仪器，探测器上则有6具（见56页图）。