DAMN!!!!!
Ok so, I kept exploring this planet because I refused to believe that the noises were cues to find caverns (they're probably that but I don't want to believe that so I'm doing my best to hold onto something that helps me to sustain my theory) and guess what!!!!
I've found new evidence that points towards living beings of some sort on this planet!!
So, let´s start:
This is how my planet looks like, this is how big the caverns are:
So, traveling around searching for clues I stumbled upon a monolith and this happened:
"The voice of an ancient tribe shakes the ground I stand on"
Cmon I can totally asume that the sound I hear is coming from some ancient beings that inhabitated the planet once, I mean even if I'm wrong there's nothing in the game telling me that I am.
But wait, there's more!!
I found this crashed ship with more data:
It says it was attacked by something, whatever it was is long dead now, that's how my quest ended but I can asume that either the hunter was drilling the planet in search of trophies or some monster used to live there.
So yeah, tell me to stop dreaming, cmon!!
Shot of the ship that's actually my new ship (have to fix it though).