Hypergiants are stars with a tremendous mass and luminosity, showing signs of a very high rate of mass loss. Hypergiants are very luminous stars, up to millions of solar luminosities, and have temperatures varying widely between 3,500 Kelvin and 35,000 Kelvin.
Because of their high masses, the lifetime of a hypergiant is very short, only a few million years compared to around 10 billion years for stars like the Sun.
See link for a pictorial representation of our Sun compared to the largest known hypergiant.
The biggest and brightest ones, the Hypergiants, which fuse furiously.
No blue stars are the largest and brightest stars know of. (They are also called Hypergiants). Red giants are dimmer.
False. Blue giants(or hypergiants) are hotter than Red giant stars. White dwarves are also hotter but they are smaller than blue giants. (As is implied by the name.)
Stars do not have weight they have mass. Our Sun is said to be one solar mass or 1.98892×1030 kg. There are stars smaller than our Sun (read dwarfs) which can be down to 0.075 solar masses and stars much much bigger than the Sun (Hypergiants) which can reach 80-150 solar masses.
Hypergiants are super luminous supergiants. It isn't all about sheer size. Eta Carinae is a hypergiant but it is smaller than the supergiant Antares. This is due to the fact that Eta Carinae is about 60 times as luminous as Antares and 10 times as massive. Although size doesn't matter, the largest star VY Canis Majoris is a Hypergiant.
Hypergiants are very rare and they have a ver short lifespan, and thus they are difficult to observe.
Red hypergiants.
We don't actually know that they don't; however, as hypergiants are quite massive, it's hard to detect the slight perturbation a planet would have on one.
The biggest and brightest ones, the Hypergiants, which fuse furiously.
Depends on how you want to classify bigger. Mass or diameter. VY Canis Majoris is a red hypergiant and has the largest diameter of any known star. See related questions for both answers
Hypergiants are relatively rare. Only a few stars become hypergiants, and they don't last very long (only a few million years). Probably a few in every major galaxy.
Red giants, red supergiants and red hypergiants.
Black Holes can destroy anything in their path. Only when the 'Hypergiant' is within range of the Black Hole.
The largest known stars are the red supergiants or hypergiants. One example, the largest known star, is VY Canis Majoris.
it's the blue hypergiants, like Eta Carinae and R136a1, which are probably the hottest stars in the Universe. These are estimated to be around 40,000 degrees Kelvin.
No blue stars are the largest and brightest stars know of. (They are also called Hypergiants). Red giants are dimmer.
Basically, all stars that aren't "giants", "supergiants", or "hypergiants" are considered dwarf stars. This means that all stars on the main sequence are dwarfs.