User blog comment:Sharpthrower/What would happen if I'd send a mass relay into a star?/@comment-5267262-20121204001210

If the relay starts firing up, then you could destabilise the star by making it too light to hold on to its outer layers, basically the star would throw out almost all of its mass in a solar wind. This probably would cause power and communications problems but not muc h more to places at most that have a good magnetosphere (like earth and other medium/large planets). If you dont have a magnetosphere then you will be faced with a pretty deadly amount of radiation.

After that has happened, the star may/may not have enough mass left to keep its nuclear reactions running and burn out. But all the planets would no longer be held in stable orbits so they will go flying off into the distance.

conclusion, the system would ultimately die (all planets would fly off until they are too far away from anything to support life) and the star may rather quickly burn out, but if you get a ship with strong shields or something to act as a magnetosphere, you may be able to evacuate some of the planets before they die out.

I just want to add that I think the alpha relay size explosion may be the exception rather than the rule since its supposed to be able to become some super version of a primary relay when the reapers want it to.