(it’s not a solar system because Sol is our star, specifically; we’re the only Solar system)
TRAPPIST-1 is a cool red dwarf star[c] with seven known exoplanets.
Up to four of the planets – designated d, e, f and g – orbit at distances where temperatures are suitable for the existence of liquid water, and are thus potentially hospitable to life.
The red dwarf star TRAPPIST-1 has an estimated lifespan of pretty much the entire lifespan of the universe. If any of those planets are habitable, and humanity goes there, we could live there until the end of the whole universe, no worrying about our sun going out in about 5 billion years. It could be our forever home.
The planets in the TRAPPIST system are extremely close to each other, so the night sky on any of them would be awe-inspiring, with multiple bodies bigger than our moon rising and setting every night.
Does it though? I imagine that even if the system malfunctioned, the atmosphere would not disappear overnight. It would likely take a long time for the atmosphere to be affected significantly, which should give plenty of time to repair the system.
Maybe, but I don’t trust generations to consistently maintain it. I’d rather a self-correcting natural process.