[Sergio]

So if the Sun blows up, we’ll know about it in 8 minutes and 22 seconds, rather than 8 minutes and 20 seconds. Phew...I feel much better now. The extra two seconds will really make a difference in my ability to make it to my shelter. /s

[FredZarguna]

Actually, the Sun is around 500 light second away [as you say] and this correction amounts to about 1.5 μ-sec, significantly less than the error in measurement already caused by the inhomogeneity of intervening material in space.