xkcd

英文频道 中文频道

XKCD中文站,一个关于浪漫、隐喻、数字、以及语言的线上漫画。

Orbital Mechanics

Orbital Mechanics
To be fair, my job at NASA was working on robots and didn't actually involve any orbital mechanics. The small positive slope over that period is because it turns out that if you hang around at NASA, you get in a lot of conversations about space.

原文链接