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