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