Man has always been an animal full of curiosity about the outside world, both to the outside world and himself, so the exploration of outer space has never stopped. The earth is the home of human beings, and it is also the first planet that human beings have known and learned. From the speculation of the round place to the later theories, people are exploring the world with curiosity, and with the promotion of science and technology, people gradually realize the whole picture of the earth, but the exploration of the earth is still not over, and human understanding of the earth is far from enough.

But while exploring the earth, people began to become interested in the existence of foreign planets. Since the discovery that the earth is not the only planet in the universe, human beings have started their own exploration road. The invention of scientific and technological products such as rockets and spaceships is enough to prove people's enthusiasm for space exploration. This is probably because the known world is never enough to make people afraid, and what everyone fears most is always the unknown. Humans explore space not only to understand the whole picture of the universe, but also to explore the unknown things in the universe.

Humans have lived on the earth for a long time, and the energy on the earth is also rapidly consumed. The earth has the ability of regeneration, but due to the large population base on the earth and the rapid growth of human beings, the earth can not adapt to this fast pace, and the energy is gradually decreasing, but it is a long process to wait for energy regeneration. In addition, due to the needs of development, the damage caused by human beings to the earth has become more and more serious. The temperature of the earth has gradually increased, glaciers have begun to melt, the atmosphere has been destroyed, and the habitats of various animals and plants have also been drastically reduced. These phenomena have also made people start to worry about the future of the earth.

The exploration of Mars and other planets is actually a means for human beings to try to find a new place to live. Although all the experiments about living on other planets have failed at present, the exploration is still going on. For the development and reproduction of mankind, the exploration of outer space is still imperative.