[QUOTE="DaveC426913, post: 3510345, member: 19467 "]You are confused. While it is true that solar flux falls off at the same rate over distance as gravity, that has nothing to do with the brightness of the star.[/QUOTE] Are you talking to yourself? I was referring to one particular star, our sun, it's particular radiant output, averaged, and the reach of this particular source compared to the reach of the gravitational field. Of course you can crank up the luminosity, without changing the long distance gravitational effect. Crank it up wherever you like, just don't be cranky. PS: trying to be rational, I was talking ratios only.