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