Five years ago two of us whiled away a cloudy night on the summit of Mauna Kea in Hawaii by placing bets on how many moons remained to be discovered in the solar system.

• 约莫五年前的一个多云夜里，杰维特与谢柏德在夏威夷茂纳开亚火山的山巅上，为消磨时间而打了个赌，赌这太阳系里还有多少颗卫星没被发现。