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