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