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