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.
blue stars are hotter
yes
I don't know about blue giants, but red giants are at the end of a star's life.
Red Giants & Blue Giants & White Dwarf star
A red giant star.
A blue giant star goes through multiple stages during its life cycle: formation from a collapsing nebula, main sequence where it fuses hydrogen into helium, red giant phase where it expands and fuses heavier elements, and finally, depending on its mass, it may end as a supernova or a black hole.
Not necessarily. The color of a star is determined by its temperature, with blue stars being hotter than red stars. Size can vary independently of temperature, so a blue star can be larger or smaller than a red star.
Red giant is a type of star.
A supergiant star can have different colors depending on its temperature. A hotter supergiant star will appear blue or white, while a cooler supergiant star will appear red or orange.
As the star balloons into the red giant phase, its surface becomes further away from the core and cools. This changes the color appearance of the star from orange or blue to red.
Yes, UY Scuti is a red supergiant star, which is a type of star that is larger and brighter than a red giant star.
Betelgeuse is a red giant.