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