What if we would find a habitable planet someday?

What if we would find a habitable planet someday?

The term "finding the habitable planet" is not similar to the term "traveling to a habitable planet. If we find a habitable planet, that doesn't mean that we can move to that planet even there is a suitable atmosphere. Even the chemical construction of the atmosphere is precisely similar to Earth, this planet can be very hostile. If the entire surface of the planet is covered by water the speed of wind can be so high, that the human would tear in the bites, and that thing makes those planets so hostile, that the landing on the surface is impossible. 

This might be the reason, why we cannot land on that kind of planet, even we could land on that kind of planet's surface. So the thing is that the term habitable planet should replace by the word habitable world or habitable space. And that thing means that the habitable space would consist of the space stations and artificial structures like ringworlds.

The thing that people would always forget in this kind of thing is that even if the planet seems hostile to us, that doesn't mean that the planet would be hostile to the creatures, what are formed on it. This means that the endemic species that kind of planet is paradise. So what if we would build the spaceship, what speed is a couple of percent of the speed of light, we can think that the travel to other stars would take thousands or even millions of years. 

Traveling to that planet is very problematic and it would take millenniums. 

Because the human being or whatever is the name of the species, which makes that journey by using giant rotating cylinders, the generations would change in that spacecraft. The creatures that are living in that craft would not ever see the planet, where they are coming from. And that means that the creatures that are traveling in that journey would adapt to the environment of the spacecraft. 

The creature, what is traveling in that extremely long space journey would not be the same, what is leaving from their home planet. When we are thinking about the genetic adaptation to the environment of that giant spacecraft, we must remember that there are also many other things than just genomes, what are adapting in that environment. 

And the most important thing is that the creatures, what have lived in their hypothetical spacecraft have ever faced weather. The environment of Dyson's sphere is always comfortable. The temperature is 21 degrees Celsius and the weather is stable. The thing is like we would spend all our life inside the house. We would not have experience with the wind or sunlight or rain. 

The thing is that those creatures would see the rain or some other thing like UV-radiation in their screens, and they have the UV-lamps on their ship. But they have ever face those things in nature. The level of brightness and temperature is fully controlled, which means that the environment in a natural planet is different. And there is probably no beasts or harmful bacteria in that fully controlled hypothetical environment.