second-level civilization,
for the use of civilization itself,
Civilizations that reach this level should be able to travel easily between stars,
If a cosmic civilization can successfully control the Dyson sphere,
is able to exploit the energy in its star system,
The second level is the stellar civilization,
It' s a huge building that encloses almost the entire star,
Dyson spheres are theoretically possible,
For example, the warp engine technology,
can utilize the full energy of the star system in which it is controlled,
including the energy of other planets, and even stars,
Harvest almost all the energy of stars with high-tech level,
Then it can be said that it is already a stellar civilization,
One possible way to harness stellar energy is the Dyson sphere,
The Dyson sphere is simply,
na looked at the transparent wooden rimless smart glasses,
even developed a way to travel faster than the speed of light,
That' s a Dyson sphere,
Say slowly:
There is a good measure of,
However, the technological level needs to be sufficiently developed,
A Dyson sphere will completely enclose
For example, you can arbitrarily travel between the Milky Way galaxy with a diameter of about 100,000 light-years,
And for the second-level stellar civilization,
In theory,
Dyson spheres are like huge structures made up of countless solar sails,
Even entire civilizations can live in a Dyson sphere,
This also means,