How long will it take for humans to move to other planets, whether there are aliens or not, and whether there will be a cosmic war?

There must be aliens, just as the ants downstairs in my house can't know that there are ants or animals in America. Compared with the universe, we are not as big as ants, there are still many unknowns outside, and the living conditions of aliens do not have to be the same as humans. However, human beings have wisdom, inheritance and the ability to change the world. If they are like dinosaurs, they will safely spend 65.438+0.6 billion years or hundreds of millions of years on the earth. Who can say that humans can't travel in space? Breaking through life and death, consciousness transfer, artificial intelligence, dark matter, supranuclear technology, and so on, generation after generation, using materials near the moon and Mars, everything is possible.

It is possible for human beings to migrate to other planets in the next 50 years. I hope that China will set up a space laboratory on the moon within 50 years, and then go to the planets in the solar system freely.

If there is no major breakthrough in interstellar navigation technology in the future, with the current level of science and technology (using nuclear fusion power to propel) and human life span (120), human beings will never want to migrate to stars. Even the nearest star to the human earth is 4.2 light years, which means the speed of light is as high as 300,000 kilometers per second. It will take more than four years to reach this star. So human beings are locked in a closed space, and don't think about interstellar immigration for at least 1000 years!