I've finally completed this amazing game, and I absolutely loved the ending as I felt it perfectly wrapped everything up, however I still can't wrap my head around some things:

1) When you're exploring the Timber Hearth mines, there's some text from the Nomai that talks about observing the 4 eyed creatures that live on the planet, which I assume is most likely referring to the Hearthians. That means they were on the planet as the same time as them, without somehow being seen. When the core on The Interloper exploded, all the Nomai in the solar system obviously died, but what about the Hearthians that were on Timber Hearth during the explosion?

2) Why is the time interval between you waking up and the supernova exactly 22 minutes?

3) How does the Ash Twin Project work (the time loop part more specifically)? If I understood correctly it was supposed to use the supernova's energy to send a launch signal to the probe on the station orbiting Giant's Deep (which is what you see when you wake up everytime), I think? I'm fairly sure this was explained in depth on the Ash Twin Projects core, however I kinda skimmed through those texts as I was afraid I was gonna run out of time

4) Are the Nomai extinct outside the main solar system?