How rocket ships go back to earth?

Answer 1

Usually, they fall back here under the influence of gravity (assuming they haven't gone much farther than the moon's orbit). If they are lucky enough to get outside the earth's "gravity well" they rely on one of Newton's laws, and need to rely on fuel to push them back (or a really tricky gravity assist from a handy gravitational body). To get them back safely, we have to consider: whether they got outside the atmosphere and will they need heat shielding for the friction, how much do we have to slow them down to land on ground without much damage (or in water if they are waterproof), where do we want it to land (can we recover it when it lands), and many other considerations depending on payload and expendability.

Answer 2

Rocket ships return to Earth by re-entering the Earth's atmosphere at high speeds. They use heat shields to protect themselves from the intense heat generated during re-entry. Parachutes or landing rockets are then used to slow down the descent and safely land the rocket on Earth.