Yeah, I was going to say it's probably to do with "sun-like" and angular size ratios. (I'm not religious, but the sun and the moon being the same angular size h

Yeah, I was going to say it's probably to do with "sun-like" and angular size ratios. (I'm not religious, but the sun and the moon being the same angular size has always felt like an easter egg that a creator might leave as a bit of fun). Sun-like is important in the search for life because despite putting out lots more energy, the suspicion is that yellow stars tend to be less temperamental in their flare behavior (so they don't scour the surface of any potential planets with large amounts of radiation every once in awhile). And there is evidence that our sun is even a particularly calm yellow star. The habitable zone is also in a region that doesn't tidally lock the planet; a day-night cycle seems important though not neccesarily a requirement for habitability. And yellow stars' lifecycle seems to be long enough to allow for life to form and evolve. Essentially they seem most likely to produce habitable planets - it's probably not mere happenstance that we live around one.