translation.en: Ten years ago, you couldn't have found an astronomer -- well, very few astronomers -- in the world who would've told you that there are any planets anywhere outside our solar system.
translation.zh: 10年前，全世界没有一个天文学家， 亦或极少数宇航员——会告诉你 除了我们的太阳系还有其他类地星球存在。