It depends how far away they are. These stars are easily visible if reasonably
close. I mean they usually can be seen easily even when they are hundreds of light years away.
I can't understand this question. There are lots of these stars that are clearly visible. Some of the brightest stars in the sky are these types.
The temperature of a blue giant star is between 12,500and 37,000 degrees Fahrenheit
The blue giant is blue because of the temperature of the gases surrounding the star. These stars are extremely hot.
sirius
the blue giant is the brightest star
blue stars are hotter
I don't know about blue giants, but red giants are at the end of a star's life.
It is a blue-white super-giant.
yes
Cygnus ob2 no.12, a hyper star is & also the biggest.
Virgo is a constellation, not a star. The brightest star in Virgo is Spica, which is a blue giant.
one is big one is small