At 4.6 billionyearsold, thesunisconsidered a middleagedstar.
It's halfwaythroughitslife, andit's knownas a yellowdoor.
Whenitbecomes a seniorandburnsupallitsfuel, itwillswellinto a redgiantandswallowMercury, Venusandprobably, Butafterthat, itwillshrinkdownandbecome a whitedwarf.
Howrude.
There's somethinginmathematicsthat's oppositeofwhat a blackholerepresents.