In our search for stars with habitable planets, we are mostly interested in

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Stable, long-lived hydrogen-fusing stars, also known as main sequence stars, are the best candidates for hosting habitable planets as they provide a stable source of energy for billions of years, allowing life to potentially develop and evolve. Giants and supergiants have very wide habitable zones, but they are not stable and have short lifespans, while dead stars like white dwarfs and neutron stars do not generate enough light and heat to support habitable planets. Stars in the process of formation are not mature enough to have planets yet.

In Our Search for Stars with Habitable Planets, We Are