Message #38387

[mccoy]

Steve, if I understood your question, it would make it a ternary (Sun+SiriusA+SiriusB) or a quadruple system (sun+dual+SiriusA+SiriusB), multiple systems are pretty common, it seems that multiple star systems have been observed up to a septuple system.

What is so difficult about the hypothesis of the sun belonging to a multiple system is that it has not been proved by direct observations or gravitational modeling. probably, the astronomer who would give such evidence would win a Nobel prize, so there has not been a lack of effort in that sense.

I would favor the hypothesis of a primordial black hole being the dual of the sun (an invisible black hole by the size of an apple), although this should have been explored by professional astronomers. The gravitational effects should be detectable.