Linear motion refers to the movement of an object in a straight line, while orbital motion refers to the curved path of an object around another object due to gravity.
Rockets move in space by using the principle of action and reaction, also known as Newton's Third Law of Motion. The rocket engine expels high-speed gas in one direction, causing the rocket to move in the opposite direction.
The laws of planetary motion were developed by Johannes Kepler in the 17th century and describe the motion of planets around the sun. They state that planets move in elliptical orbits with the sun at one focus and that the square of the orbital period is proportional to the cube of the semi-major axis of the orbit.
Astronauts move in outer space by using tools such as thrusters, jetpacks, and tethers. They can also use the gravitational pull of nearby objects to propel themselves forward, similar to how planets orbit around the sun.
Gravity plays a key role in moving objects in space. It is responsible for the orbital motion of planets, moons, and other celestial bodies. It also affects the trajectory of objects, such as spacecraft, in space. Without gravity, objects would continue to move in a straight line at a constant speed.