If UY Scuti replaced our Sun, how far might its outer layers extend?

Answer

Past the orbit of Jupiter, or perhaps even Saturn

The star's vast scale suggests its outer layers could likely extend beyond the orbit of Jupiter, and possibly beyond Saturn, depending on its size variability.

If UY Scuti replaced our Sun, how far might its outer layers extend?

#Videos

What If Earth Orbited UY Scuti? - YouTube

astronomystarstellar evolutionUY Scutisupergiant