Why can’t the girl who went to Mars come back?

Because our current technology simply cannot do it and return from Mars.

Because our current technology simply cannot do it, return from Mars, so after landing, we can only stay there. It’s not that we don’t want him to come back, but it’s technically impossible. Just can't reach it.

Actually, I think this is a bit too much. Putting a robot is enough. A real person may be excited when he first agrees, but who can bear to stay there for so long.

The distance between Mars and the Earth

The short distance is about 55 million kilometers, and the farthest distance is more than 400 million kilometers. Close encounters between the two occur approximately every 15 years. In 1988, the distance between Mars and the Earth once reached about 58.8 million kilometers, and in 2018, the distance between the two will reach 57.6 million kilometers. But on August 27, 2003, the distance between Mars and the Earth was only about 55.76 million kilometers, which was the closest in 60,000 years.

However, according to astronomers’ calculations, during the 800 years from 1600 to 2400 AD, Mars was only the third closest to the Earth. According to the calculation results, by September 2, 2366, the distance between the two will be approximately 55.71 million kilometers. By August 28, 2287, the two will be even closer, with a distance of approximately 55.69 million kilometers.