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