Outer Wilds base game spoilers
You know the gravity cannon on Ember Twin? When I was watching someone's playthrough, a weird question came to my mind: why here? Why is the cannon was put on Ember Twin, of all planets.
Amusingly, there IS a reason! The planet is filling with sand and, a few minutes before supernova, the cannon becomes completely inaccessible. Incidentally, a few minutes before supernova, the Interloper gets consumed by the expanding sun.
The placement of that cannon is anything but accidental.