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