The difference in colors actually depends on a lot of different factors. The first is the composition of a star. While stars are all basically composed of atoms some stars have other trace elements in them that can alter the wavelengths of light that they emit. The next factor is surface temperature. This is the most significant contributor to a star's color. The change in temperature changes the wavelength of light a star emits. The last factor is distance in relation to the Doppler Effect.
A red color, in a star, is associated with a low surface temperature.
The giant star
It appears red, as it is a red supergiant. red is the color of Antares star.... RED! it is a super giant
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.
Alpha Ophiuchi is considered to have a stellar classification of A5 III, which makes it a "normal" giant, not a supergiant.
Hypergiant.
super giants are a very very big star
A Super Nova.
A star is considered "dead" when nuclear fusion stops in its core. The name of the a star before this happens depends on its size. If its a star the size of our own, Sol, then it will be called a red giant. If it is considerably lager then it will be called either a giant, bright giant, super giant or hyper giant. This again depends on its size.
super-giant star
one is big one is small
Stellar Nebula - Average Star- Red Giant - Planetary Nebula - White Dwarf Stellar Nebula - Massive Star - Red Super Giant - Super Nova- Neutron Star Stellar Nebula - Massive star - Red Super Giant -Super Nova - Black Hole