Question

for what purpose are rocks used in space travel?​

Answer 1

Answer:

NASA and other scientists study space rocks to help us learn about the origin of our solar system. Asteroids are thought to be the leftovers from the formation of the inner solar system, including Earth. Comets are thought to be leftovers from the formation of the outer planets. NASA has missions to Near-Earth Objects.

Answer 2

Answer:

Space. It's not just a cool place to explore -- it rocks. And, space has many rocks! The rocks in space are sometimes called small bodies. Some of them are larger and are called minor planets or planetoids. They may also be known as NEOs -- Near Earth Objects. Whatever they may be called, they have much to tell us about our solar system. The three main types of space rocks are comets, asteroids and meteoroids.

Explanation:

NASA and other scientists study space rocks to help us learn about the origin of our solar system. Asteroids are thought to be the leftovers from the formation of the inner solar system, including Earth. Comets are thought to be leftovers from the formation of the outer planets.