Look. Learn.

[TtTOtW]

This guy know his stuff. I insta-subbed.

 

[James Brown]

Whoah……

 

[Mars Pathfinder]

This guy know his stuff. I insta-subbed.

Hehe..... New year is hours from now.... Hehe....

*insert evil i mean mad sci laugh*

 

[MadAstronomer]

I've never thought that I'll find someone who will help me finally understand how these complicated rocket engines work. You can't even imagine how many books and scientific literature I've read and found all answers to my questions in YouTube video..Thank you so much. I see this guy is worth subscribing to.