How do spacecraft slow down in the vacuum

How do spacecraft slow down in the vacuum space?

It's is a challenging one question but one that's nasa engineers have been working on 4 decades in this video we interview a nasa technologist to learn about different ways that's spacecraft can slow down.
We discuss two Main methods of slowing down spacecraft

1 retropulsion
2 aero breaking
We also discuss some of the new technologies that nasa is developing to slow down spacecraft such as inflatable aerodynamic deelerators and solar. Sail
This video is a great resource for anyone who is interested in spaceflight sand spacecraft work