About 165 Earth years makes one Neptunian year.

165 个地球年等于一个海王星年。

What about trojans and centaurs and comets and trans-Neptunian objects?

特洛伊木马、半人马、彗星和跨海王星天体呢？

The acronym trans-Neptunian objects is TNOs.

跨海王星天体的首字母缩写词是 TNOs。

Author and astronomer David Whitehouse joined Dan Damon, who asked how long is a Neptunian day.

丹•戴蒙问，在海王星上一天是多长？让天文学家兼作家大卫•惠特豪斯来为您解答。

There are estimated to be billions of trans-Neptunian objects, even if at this moment, we have only discovered around 3000 of them.

据估计，海王星外天体有数十亿个，即使目前我们只发现了大约 3000 个。