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What are M class stars?

Updated: 9/17/2023
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Cosmospup

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14y ago

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M Class stars have the following characteristics.

  • Temperature: < 3,700 Kelvin
  • Colour: Red -> Orange-red
  • Mass: < 0.45 Solar masses
  • Radius: < 0.7 Solar radius
  • Luminosity: < 0.08 Solar luminosities.
  • Rarity: 76.45% of all main sequence stars.
Examples: Betelgeuse

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Q: What are M class stars?
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Majority of stars are small cool type-M stars?

Correct. M-type stars on the main sequence are called red dwarfs.


Is a red star hotter than a blue star?

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!


What spectral class of stars are less common?

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.


What class of stars are the largest?

Blue (O).


Which kinds of stars are most common in a newly formed star cluster?

M stars

Related questions

The weakest hydrogen line stars are classified as?

class q (third answer)


What type of star is Star A?

Red stars (Red dwarfs and red giants) have a spectral class of M.


What type of star is a red star?

Red stars (Red dwarfs and red giants) have a spectral class of M.


How many years do spectral class O5 stars remain on the main sequence?

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.


What is the M stars molecues?

M stars contan metal oxides molecules.


Why do stars of spectral class M not show strong lines of hydrogen in their spectra?

their surfaces are so cool that most hydrogen is in the ground state.


What is the most common star category?

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.


What is a digonal band of stars that contain hot bule bright stars that cool red dim stars?

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.


Majority of stars are small cool type-M stars?

Correct. M-type stars on the main sequence are called red dwarfs.


What is class license?

M Class


When was TGR M class created?

TGR M class was created in 1912.


Is a red star hotter than a blue star?

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!