> To decrease the orbit radius the exact same procedure, but instead of burning thrust retrograde, you will need to burn prograde. While I get it, correspondin

> To decrease the orbit radius the exact same procedure, but instead of burning thrust retrograde, you will need to burn prograde. While I get it, corresponding to the way you explained it a few paragraphs earlier, you mean that in order to slow down you need to burn the engine so that the fire goes out in the prograde direction, this is not how we normally describe it. This is a retrograde burn, because the force acting on the spacecraft is in the retrograde direction.