The future of mankind belongs to the sea of stars.

# How far are we from moving to Mars #

Throughout the ages, human beings have always been unknown to space. How big is the space? How many planets are there in space? Is there any other life like human beings in space? These problems have been puzzling mankind. But with the development of science and technology, human beings began to have a clear understanding of space.

In the process of scientific development, many scientists put forward their understanding of the universe. Ptolemy put forward a complete geocentric theory in the 2nd century A.D. This theory holds that the earth is stationary at the center of the universe, and the moon, sun, planets and outermost stars are all rotating around the earth at different speeds. 19438+0543, Copernicus put forward the scientific Heliocentrism, thinking that the sun is at the center of the universe, and the earth is an ordinary planet, which revolves around the sun in a circular orbit.10000000103 Kepler revealed that the earth and planets revolve around the sun in elliptical orbits, and developed Copernicus's Heliocentrism. In the same year, Galileo Galilei took the lead in observing the sky with a telescope, and confirmed the correctness of Heliocentrism with a large number of observation facts. 1938+0687, Newton put forward the law of universal gravitation, which profoundly revealed the mechanical reasons for the motion of planets around the sun and gave Heliocentrism a solid mechanical foundation. After that, people gradually established the scientific concept of the solar system. Research achievements of contemporary astronomy.

Since ancient times, human exploration of space and the universe has never stopped. For the aerospace industry, people always have the spirit of not being afraid of sacrifice and taking risks. As early as the Ming Dynasty, Tao Chengdao, a native of Wan Hu, was praised as "the first person in the world's space dream" for trying to fly a rocket.

Hundreds of years later, with the continuous progress of science and technology, manned space flight became possible. /KOOC-0/96/KOOC-0/April/KOOC-0/2, Soviet Major yuri gagarin set a record for human beings to go into space, and Dongfang/KOOC-0/spacecraft sent him into space. This spaceship was made by the Soviet Space Agency, and it also became the first human aircraft in the history of space exploration. The task duration of Dongfang 1 is 1 hour and 48 minutes. Although the manned space mission ended in failure, it did not give up the idea of further exploring space. On the contrary, it made human beings more curious about unknown space and strengthened their belief in realizing manned space flight. 1969 On July 20th, NASA became the first space agency to send a man to the moon. On that day, neil armstrong became the first man to land on the moon, followed by another astronaut, buzz aldrin. Apollo 1 1 was driven by Michael collins. Several astronauts collected samples from the surface of the moon and took photos. 1July 24, 969, they returned to earth safely. This landing on the moon is undoubtedly one of the most important achievements in the history of human spaceflight, because the equipment it left on the moon, as well as the lunar soil and rocks brought back to earth, are still helping us understand the moon.

When it comes to manned space flight, we have to mention Shenzhou 5 in China. It is the fifth spacecraft launched by China's manned spaceflight project and the first manned spacecraft launched by People's Republic of China (PRC). The Shenzhou 5 spacecraft carrying astronaut Yang Liwei was launched at Jiuquan Satellite Launch Center at 9: 00 Beijing time on June 65438+/KLOC-0+May 2003, with an orbit of 14, which lasted 2 1 hour and 23 minutes. Its return capsule returned to Inner Mongolia on June 65438+1October 65438+June 6, 2003 at 6: 23 Beijing time. Shenzhou 5's successful launch has realized China people's dream of flying for thousands of years. It is a highly condensed wisdom and spirit of the Chinese nation and a new milestone in China's space industry in the 2 1 century. With the development of aerospace industry, the outlook of outer space is no longer confined to the solar system.

Voyager 1 is the first man-made spacecraft to leave the solar system. It was introduced by 1977. Its mission is to study the solar system in depth, and it has maintained a running record for 36 years. It left the solar system on September 20 13 12, with an actual distance of1900 million kilometers from the sun. Scientists confirmed that Voyager 1 flew in plasma for more than a year after entering interstellar space, and also detected the pressure change between the edge of the solar system and interstellar space during the voyage. Viking 1, launched at the same time as Voyager 1, started human exploration of other planets in the Milky Way.

I always believe that if China's recognition of human destiny can be recognized by all countries in the world, then we can gather the strength of all mankind to vigorously develop science and technology, and in the future, mankind will truly go out of the earth and into space.