Answering questions on vacuum, space, rockets, and space travel
On about September 21, 2017 I received via email some questions/comments related to vacuum and how rockets and spacecraft are able to operate in space. I replied within about 1 day and my responses are presented below slightly edited. QUESTIONS/COMMENTS AS PRESENTED How can anything be propagated through space if it is a vacuum, nothing? If space is a vacuum then what does the rocket push off of? How does the rocket maintain its heading and not spin out of control if there is no air to stabilize off of? Space travel believers will say that they use special propellant that when ejected out of the thruster nozzle has an equal and opposite reaction. If that’s the case then wouldn't the thrusters on let’s say the space shuttle when maneuvering to the ISS have to eject the special propellant faster than 17,500MPH which is the speed they are traveling? All tests show that rockets don't work in a vacuum. T MARK HIGHTOWER’S RESPONSE I am ...