The ONLY thing that puzzles me about this behavior is how scientists can think there is anything abnormal about this. Theings are constantly in flux, but on galactic scales.
Out sun viewed in time-lapse photography probably sputters bright and dim all the time- we just dont see it because it takes thousands of years.
By the same token I bet our planets either move in and crash into the sun OR move away and fling out into space, ... eventlually.
Wholeheartedly agree -- knowledge is never complete.