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