Answer:
The largest one we've spotted in the universe so far is UY Scuti, a star 9,500 light-years away, close to the center of the Milky Way in the constellation Scutum ('shield'). It's a dust-enshrouded red supergiant (the largest class of stars out there) that's around 1,700 times larger than our Sun in diameter.
Step-by-step explanation: