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How does the habitable zone around a main sequence star of spectral type M compare with that around the Sun?

  • How does the habitable zone around a main sequence star of spectral type M compare with that around the Sun (a main sequence star of spectral type G). A. The habitable zone around the M star will be cooler than the habitable zone around a G star. B. It is smaller and closer to the star C. It is larger and further from the star. D. An M star does not have a habitable zone because it is not hot enough.

  • Answer:

    B. It is smaller and closer to the star (less than 0.44 AU)

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