제2의 지구는 존재한다… 하지만 너무 멀다

Somewhere in the universe, there may exist planets very similar to Earth. Scientists have already discovered several "second Earth" candidates, and the possibility that life exists on some of them has even been raised. However, there is a problem. Even the nearest Earth-like planet is so far away that it is virtually impossible to reach with humanity's current technology. Can the space migration and interstellar travel we dream of truly become a reality? In this video, we examine how far away the nearest second Earth is, the time required to reach it, and whether humanity will ever be able to overcome that distance. The moment you understand the scale of the universe, your worldview can change completely.