Confusing Korean Words 수평선 vs 지평선

In English the horizon means the line at which the land (or sea) appears to touch the sky.

In Korean however, the horizon where the land meets the sky is called 지평선,

and the horizon where the sea meets the sky is called 수평선.

How about the 'event horizon' in Korean? 

Although there are no sea or land around the black hole,

the 'event horizon' in Korean is called '사건의 지평선' 

and there's a K-pop song titled '사건의 지평선' sung by 윤하(Younha)

 

지평선 (the sky meets the land)

 

 

수평선 (the sky meets the sea)

 

https://youtu.be/BBdC1rl5sKY