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What fraction of stars in your galaxy have lifetimes long enough to support life?
Wiki User
∙ 14y ago
The question of planet habitability [See Link] is based on early F or G, to mid-K type stars. This equates to approximately 15% of all stars in main sequence.
However, it has been estimated that 50 % of these will be binary star systems, which in most cases would not be stable enough to offer any chance of life. However a study of Alpha Centauri, suggested that binaries need not be discounted in the search for habitable planets.
So about 7.5% of all stars could be suitable for planet habitability,
Saying there are 400 billion stars in our Galaxy, means around 30 billion stars could be suitable.
Wiki User
∙ 14y ago
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