Telescopes can see farther without image distortion and can record more accurate colors. 

Telescopes collect more light and are unaffected by twinkling. 

Telescopes can collect far more light with far better angular resolution. 

Telescopes have much more magnification and don't detect light from the glowing Earth's atmosphere.

Telescopes can collect far more light and are not impacted by absorption of light by the atmosphere. 

stars that are at least several times the mass of the Sun

stars that are similar in mass to the Sun

all stars that are red in color 

 stars that are smaller in mass than the Sun 

all stars that are yellow in color

The red star is more massive than the blue star. 

The blue star is older than the red star. 

The blue star is farther away than the red star. 

The red star has a hotter surface temperature than the blue star. 

The blue star has a hotter surface temperature than the red star. 

We'd see a cloud of gas expanding away from the position where Betelgeuse used to be. Over a period of a few weeks, this cloud would fill our entire sky.

Betelgeuse would remain a dot of light but would suddenly become so bright that, for a few weeks, we'd be able to see this dot in the daytime.

Because the supernova event destroys the star, Betelgeuse would suddenly disappear from view.

Betelgeuse would suddenly appear to grow larger in size, soon reaching the size of the full moon. It would also be about as bright as the full moon.