At the current development speed of space science and technology, how long will it take for mankind to colonize the solar system and start the era of space navigation?

Nowadays, space science and technology are developing rapidly, but there is no such technology to build a large spacecraft with a capacity of hundreds or even thousands of people. In order to immigrate to other planets in the solar system, human beings need to solve the problems of the source and production of oxygen, carbon dioxide, water, food, vegetables and fruits, and the virtuous circle.

Nowadays, space science and technology are developing rapidly, but there is no such technology to build a large spacecraft with a capacity of hundreds or even thousands of people.

In order to immigrate to other planets in the solar system, human beings need to solve the problems of the source and production of oxygen, carbon dioxide, water, food, vegetables and fruits, and the virtuous circle. It is conceivable that it is not a problem to immigrate to the moon and Mars within one hundred years, but to build a spacecraft close to or exceeding the speed of light, human beings need to invent new science and technology, discover new power sources, and solve the power technology and safety problems of spacecraft. The solution to this problem is partly due to luck. If you are lucky, it can be solved within 3500 years; if you are unlucky, it will take at least 12000.

In a word, the large-scale migration of earth people to other planets in the sun has opened up the great aviation generation of the solar system and even the Milky Way. I'm afraid our generation can't wait. Live the life you should live honestly. However, we should still be full of expectations. ? ,