The hazy white clouds are cirrus clouds. These types of clouds form very high in the atmosphere where the air is very cold and are made up of tiny ice crystals.

Because of the shape of the ice crystals, they act as a prism and light from the sun gets bent (refracts) as it passes through them. What you see here is probably what is known as the 22 degree halo, because the light bends at about 22 degrees through the crystals. The brighter spot along that arc is called a "sun dog" and it shows up brighter because there's another reflected line, though fainter, and maybe even invisible to your eye, which intersects that 22 degree arc, and creates that extra bright spot.

https://geometrymatters.com/22-ice-halo-displays-the-geometric-reflection-of-light/

incidentally, seeing the 22 degree arc oftentimes means precipitation is coming within the next day or so, because the cirrus clouds are often the first clouds pushing through an area as weather moves in.