M Class stars have the following characteristics.
Correct. M-type stars on the main sequence are called red dwarfs.
yes they are, in fact, white stars a hotter than blue or red star, and blue stars are varie in sizes, red stars are usually mid size or red giants or super giants. the bigger they are does not mean they are hotter!
This is more complicated than it might seem. The short answer is "M, T, or Y, depending." The coolest type in the Harvard classification system is M; red or (in late M) brown dwarfs. Class M stars have temperatures below around 3700 K. In order to further distinguish between stars at the very low end of the temperature scale, a few new classes have been proposed. In this new classification scheme, stars between 1300-2000 K are assigned type L; stars below 1300 K are assigned type T. The main reason for choosing this particular temperature is that around 1300 K the spectrum of the star changes and they begin to show evidence of methane in their atmospheres, so type T stars are also called "methane dwarfs". Finally, a hypothetical type Y has been proposed for "ammonia dwarfs", stars which show ammonia absorption lines in their spectra. There is some dispute whether or not any type Y stars have actually been found or not. Type Y stars are expected to be cooler than 600 K or so.
Blue (O).
M stars
class q (third answer)
Red stars (Red dwarfs and red giants) have a spectral class of M.
Red stars (Red dwarfs and red giants) have a spectral class of M.
It all depends on the mass of the star 1exp10*(m/l) where "m" is mass and "l" is luminosity. Will give you an approximate period of the stars life.
M stars contan metal oxides molecules.
their surfaces are so cool that most hydrogen is in the ground state.
Bright stars are rare, dim stars are common, so class M are the most common that we can see, but even dimmer ones are postulated to be even more common.
Almost all stars end their lives as Red stars. There are a few exceptions to the rules. Such as stars from the spectral class of B4-O5 will never be stable enough to reach a red supergiant phase and these stars go supernova while their still close to the spectral type they began life as. A great example of one of these stars is the Hyper giant Rho Cas, which is near the end of its short life and will blow up as a F9-G3 star never reaching the orange K class or the Red M class.
Correct. M-type stars on the main sequence are called red dwarfs.
M Class
TGR M class was created in 1912.
yes they are, in fact, white stars a hotter than blue or red star, and blue stars are varie in sizes, red stars are usually mid size or red giants or super giants. the bigger they are does not mean they are hotter!