But then you're go into orbital mechanics.

然后你要学习轨道力学。

It's pretty weird, but a natural outcome of orbital mechanics.

这很奇怪，但这是轨道力学的自然结果。

Why was she not allowed into the engineers' lectures on orbital mechanics and rocket propulsion?

为什么不让她参加工程师们关于轨道力学和火箭推进的讲座？

The vagaries of orbital mechanics mean that OSIRIS-REx will not reach its quarry until a few days after that hair-raising astronomical near miss.

变幻莫测的轨道力学意味着奥西里斯-雷克斯要到那次令人毛骨悚然的天文差点事件发生几天后才能到达它的猎物。

One half of its surface— the half which, thanks to the vagaries of orbital mechanics, always faces Earth— is dominated by dark, smooth expanses of ancient, frozen lava known as maria.

其表面的一半---由于轨道力学的变幻莫测，这一半总是面对地球---一直处于黑暗之中, 这片黑暗的地方被称为月海，不仅平坦广阔，而且由古老而冻结的火山岩形成。

The French mathematician Urbain Le Verrier concluded that this was due to an unseen planet, and was able to use the mathematics of orbital mechanics to predict where the new planet would be.

法国数学家乌尔班·勒维耶(Urbain Le Verrier)的结论是，这是由一颗看不见的行星造成的，且能够利用轨道力学的数学原理来预测这颗新行星的位置。

So I'm gonna give a little bit of orbital mechanics 101 here, and talk about how we go to orbit, and how we do it really really differently from everybody else.

所以我要在这里介绍一点轨道力学 101，并谈谈我们如何进入轨道， 以及我们如何以真正不同于其他人的方式做到这一点。

Mr Houston explains how John Glenn, an American astronaut, insisted on having the trajectory of his spacecraft hand-checked by Katherine Johnson, an expert in orbital mechanics, using a Friden STW-10 electro-mechanical calculator.

休斯顿先生解释了美国宇航员约翰·格伦 (John Glenn) 如何坚持让轨道力学专家凯瑟琳·约翰逊 (Katherine Johnson) 使用 Friden STW-10 机电计算器手工检查他的航天器轨迹。