I think Spacex is playing games. First stage landing makes no sense. In order to reuse the first stage rocket, there are cheaper and better way, such as parachute.

To maximize the efficiency of sending payload into orbit, the last drop rocket fuel in the first stage should be used to accelerate the second stage.

In space, you cannot measure speed, cannot use friction to control direction, the only power source for changing speed and direction is rocket fuel.

You cannot exchange heat with space, you cannot radiate heat into space. No AC system will work. Manned space mission is impossible.

NASA says a signal from Voyager 1, traveling at the speed of light, takes 17 hours one way to reach Earth.

I know this is a lie/mistake, there is no communication latency in vacuum space, light/em wave/information/energy/emf speed is infinite in vacuum space.

I wonder how much power able to send a signal over billions miles from voyager to earth?

Therefore, I believe all space missions are fake.