<h1>The road is long</h1>
Humans have existed on Earth for 3 million years, and for such a long time, we have not been imprisoned on Earth, because in the future human beings will soar to the sky and explore the entire solar system, and Mars exploration is the focus of human beings at the moment. But the journey to Mars is long and dangerous, and even the program's CEO, Elon Musk, said that on the way to Mars, there will definitely be many astronauts dying, but they will all fight for honor.
<h1>Hell environment
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If you were allowed to live on Mount Everest, you would feel like hell. But if you compare it to Mars, Mount Everest is heaven. Mars belongs to eight planets, with an average distance of 55 million kilometers from Earth, in fact, this distance is not worth mentioning for humans, because human probes, the Voyager series have flown out of the boundary of the solar system, the top of the heliosphere. So it's a very easy thing for a probe to reach Mars, but it's only for unmanned spacecraft, and if it's a manned flight, it's going to be a long journey.
<h1>Fatal temperature difference
Mars for humans, is a strange and dangerous world, the temperature difference between day and night is more than 100 degrees Celsius, enough to make any life can not survive here, in addition to the weather of Mars is fickle, the clear sky will be swept by sandstorms in an instant, to know that the dust storms of Mars are very terrible. If none of us have encountered it, then the deadly radiation from Mars is still a problem.
In the long journey to space, it will be a painful ordeal for astronauts. Imagine what it would be like to have you in a small black room for a day, and in space, astronauts stay not for a day, but for months, and the nearest journey from Earth to Mars takes months, and it is a year to go back and forth, and in this year's time, astronauts can only see the dark deep space.
<h1>Atmospheric action
Some friends said that the universe is not very beautiful, where the stars are twinkling. In fact, this is a wrong understanding. Just like when we look at the starry sky at night, the reason why we can see the starry sky comes from the atmosphere, but in fact, during the day, the starry sky still exists, and the reason why we can't see it is because the light of the sun covers them. The same is true in space.
While the spacecraft is sailing, if the spacecraft is shrouded in sunlight, then the space that the astronauts see is a darkness, yes, at a glance, everywhere is shrouded in darkness. Astronauts will stay in this environment for several months, in such a depressing environment, which has a very large impact on the spirit and brain.
<h1>Boundless deep space
Moreover, astronauts who have been in a gravity-free space environment for a long time will also cause a lot of damage to the body. And most importantly, there is no signal in space, devices such as mobile phones will not be available, and due to the limited payload capacity of the spacecraft, it is impossible to let you take your game console to Mars.
When the astronauts spend several months to reach Mars, they can implement a manned landing, but before that, a smooth and safe landing is required, and at present, with human landing technology, it is possible to successfully land on Mars, and then the astronauts walk out of the hatch, which means that they will rely on existing resources to survive on Mars for several years.
<h1>Mars experiments
During this period, they will carry out a series of experiments, such as exploring Martian lifeforms, analyzing Martian geological formations, and cultivating Earth crops on Mars. And after all these experiments are over, they have a chance to return to Earth, of course, if anything goes wrong during this period, then they will never be able to return to Earth.
That's why Musk would say that on the way to Mars, there will be dead people. These astronauts have two paths in front of them, succeed, enjoy the glory and wealth, and their deeds will go down in the annals of human history and become heroes like Armstrong. If they fail, their deeds will always remain in people's memories.