system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If you were in a spacecraft moving at 1000 miles/hour in outer space and you turned off the engines, what would happen to the speed and direction of your spacecraft & why?
gpt
Nothing. First law of motion: and object in motion stays in motion, in a straight line, until acted upon by another force.

So until a force acts upon your space craft it will continue moving at 1000 miles/hour in the same direction.