In need of a chill open-world game.

May catch a lot of flak for this but No Man's Sky is honestly a fantastic open world game in my opinion. It's really grindy at times but it's a good game to just sit back and explore the area you're given. Imagine a more in-depth Space Engineers.
I enjoy it so much because you can do virtually anything you want, and the economy of the game is actually quite interesting. Plus, who doesn't like flying around a completely open universe with trillions upon trillions of planets?