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