Outer Wilds updates:
I mustered up courage and flew towards the Interloper. Getting there I saw how it would "open its mouth" at one point, and I was too scared/taken by surprise to jump into its core; it quickly "closed its mouth" and I stood there waiting for another opportunity to get inside. After seeing how that didn't happen I flew to some random direction to end the loop early, and noticed how there was something on the asteroid's butt.
On the next loop, I went straight to the Interloper's butt and found a frozen shuttle, and realized its act of "opening its mouth" was just the ice melting down when near the sun, and freezing back again, but I still wasn't fast enough to get inside. That's one of my next goals.

Went to the Hourglass Twins and after some tries learned that I need to explore one of the twins early on, and the other at the end. I found a huge subterranean system of caverns, but one of them mentioned an anglerfish and I was, again, too scared to continue. Will explore more at some point.
I did find the gravity cannon to bring back the ship that was frozen on the Interloper! Entering the ship, I saw the skeleton of a dead Nomai who was there waiting for his peers :c. And I found another one of the escape pods too, the only one I'm missing is the one on the evil vine planet.

Question: I saw a couple of rooms enclosed by walls that I couldn't go through, but with a readable text inside. I couldn't get close enough to use the translator, but there were holes small enough for me to send the scout (the game even tells me to use the scout to take a look at those rooms). How can I get into those places?

Near the Twins, there is an extremely curious gas (I assume it's gas) giant. It is unnamed and not marked in the map; when I send a scout into it, it gets destroyed and never leaves the sphere from the other side; but if I try to go through it, it vanishes in the vacuum. What's up with that?!

Lastly, in the last loops I noticed a blinking, small, and very fast blue thing flying through the system. After many tries I caught up to it and saw how it was something like a beacon, with the Eye symbol and nothing else. I followed it as it went out of the system, and was by its side 600 thousand kms away from the sun when it went nova. There is certainly something curious about it but I don't know what yet. Theory: when I open my eyes at the start of the loop I see something blue being shot from Giant's Deep, I assume that's the beacon I followed. I need to go there to see who launched it.