Soru: How do spaceships navigate in the vacuum of space where there is no air?
Çözüm: In space, there is no air for propulsion like airplanes use. Spaceships navigate using rocket engines that expel exhaust gases at high speed, following Newton's third law of motion: for every action, there is an equal and opposite reaction. By firing thrusters in different directions, they can change speed, direction, or orientation. For example, to enter orbit, a spaceship accelerates to reach orbital velocity, and to return to Earth, it uses retro-rockets to slow down and re-enter the atmosphere.
