I don't recall the previous discussions, but without outright ruling out possibilities for things... * If it is some structure being built at/around the star,

I don't recall the previous discussions, but without outright ruling out possibilities for things... * If it is some structure being built at/around the star, has anyone done the math on the rate of such a structure occluding the star from us to match the observed rate of change? * On a similar line of reasoning, what if the star were either being drained as a power source or caught in some kind of SG1 (that stargate TV series) level disaster? To be clear, I don't think that they're likely, but I'd rather they were eliminated for an obvious actual flaw instead of simply being unlikely.