Main Sequence Lifetime
The overall lifespan of a star is determined by its mass. Since stars spend roughly 90% of their lives burning hydrogen into helium on the main sequence (MS), their 'main sequence lifetime' is also determined by their mass.
Main Sequence Lifetime - The length of time that a star spends as a main sequence star
Major Axis - The axis of an ellipse that passes through both foci. The major axis is the longest straight line that can be drawn inside an ellipse ...
Typical Main Sequence Lifetime (in years)
Post Main Sequence Fusion
Post Fusion Event ...
Star main sequence lifetime = [star's mass / star's luminosity] × 1010 years.
Star main sequence lifetime = 1010 / (star's mass)(p - 1), where p = 3 for stars more massive than 30 solar masses and p = 4 for stars less massive than 10 solar masses.
4. The main sequence lifetime of the Sun is 10 billion years. About what is the main sequence lifetime of a star that is four times as massive?
The total main sequence lifetime of a star can be estimated from its mass relative to the Sun's as follows:
tau_{ms} sim 10^{10} cdot left [frac{M_bigodot}{M} right ]^{2.5}mbox{ years} ...
The predicted main sequence lifetime of a red dwarf star plotted against its mass relative to the Sun.[1] ...
They finish their main sequence lifetime in a way similar to the lower mass stars, but become brighter and cooler on the outside and are called red supergiants.
A star’s main sequence lifetime is determined by its mass. Massive stars need higher central temperatures and pressures to support themselves against gravitational collapse, ...
The Sun has a 10 billion year main sequence lifetime (of which half is gone). The most massive stars live only a couple million years, the least massive for trillions, so long that no star with a mass less than about 0.
Stars spend most of their lives on the main sequence and change very little during that time. The Sun has a main sequence lifetime of about 1010 years.
However, this takes much less time than the main sequence lifetime, and may be as short as ten million years as opposed to the billions of years a star may spend on the main sequence.
because a star's luminosity is approximately proportional to its mass to the fourth power - M4. Due to this, it runs through its nuclear fuel much more quickly, despite its higher initial mass. The table to the right shows the Main Sequence lifetimes ...
However, they use that fuel at a very big rate. So, even though they are big, they live the shortest lives. You can see the typical main sequence lifetimes of stars of various masses in the table below.
" The main sequence lifetime of a red dwarf is about 100 billion years, but some may last around a trillion years.
 See also: Main Sequence, Star, Sun, Core, Hydrogen
  
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