Is it possible for humans to get out of the solar system? Why?

It is possible that solar sails should be a feasible way of interstellar navigation at this stage, provided, of course, that the problems of human replenishment in space and human aging are solved.

First, let's introduce the solar sail.

The concept of solar sail first appeared in Arthur Clark's science fiction in 1950s.

The principle of solar sail is to rely on the light pressure of the sun to propel the spacecraft. Because light itself is actually a fluctuating elementary particle. So it can be understood that the wind pushes the sailboat.

But solar sails also have the maximum speed, which is 2% of the speed of light in theory, that is, 6000 km/s, and the radius of the solar system is almost 4.4 billion kilometers.

So if the spacecraft can accelerate to 6000km/s through the solar sail after leaving the earth, it will fly out of the solar system in almost a month.

Unfortunately, this is just a hypothesis. It takes a long time for solar sails to accelerate.

I think it is remarkable that human beings can master the interstellar migration of planets near the earth within 200 years.