THE WORLD WILL have to wait a little longer for the first launch of human beings into space in a craft not run by a national government. Crew Dragon is designed, built and operated by SpaceX, a private firm founded by Elon Musk—as is the Falcon 9 rocket its sits on.

请查实：it sits on 还是 its sits on？

Crew Dragon is designed, built and operated by SpaceX, a private firm founded by Elon Musk — as is the Falcon 9 rocket it sits on.

as is the Falcon 9 rocket it sits on：这是 as 引导的倒装句。it sits on 是 the Falcon 9 rocket 的定语从句。

倒装结构的构成：A is designed...，as is B. （A 由公司设计，B 也是。）

本句， as 是比较连词，意为：“像……一样”，经常用于倒装，尤其省略成分时。例如：

(1) They go to concerts frequently, as do I. 

他们经常去听音乐会，我也是。

(2) She's unusually tall, as are both her parents. 

她特别高，她父母也都那么高。