system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does NASA use russian capsules instead of making their own capsules?
gpt
Nasa does not "use" russian capsules, instead they book seats on the soyuz capsules which fly from Baikonur, Kazakhstan. There are currently efforts in the USA to develop capsules, by NASA itself but also mainly by private companies like spaceX and ULA. But as long as these are not fully certified and tested they will need to continue to book seats on the soyuz capsules.