Is it possible to harbor an advanced civilization on a 10Msun main-sequence star?

Answer 1

"Suitable star systems

An understanding of planetary habitability begins with stars. While bodies that are generally Earth-like may be plentiful, it is just as important that their larger system be agreeable to life. Under the auspices of SETI's Project Phoenix, scientists Margaret Turnbull and Jill Tarter developed the "HabCat" (or Catalogue of Habitable Stellar Systems) in 2002. The catalogue was formed by winnowing the nearly 120,000 stars of the larger Hipparcos Catalogue into a core group of 17,000 "HabStars," and the selection criteria that were used provide a good starting point for understanding which astrophysical factors are necessary to habitable planets [1].

[edit] Spectral class

The spectral class of a star indicates its photospheric temperature, which (for main-sequence stars) correlates to overall mass. The appropriate spectral range for "HabStars" is presently considered to be "early F" or "G", to "mid-K". This corresponds to temperatures of a little more than 7,000 K down to a little more than 4,000 K; the Sun (not coincidentally) is directly in the middle of these bounds, classified as a G2 star. "Middle-class" stars of this sort have a number of characteristics considered important to planetary habitability:

* They live at least a few billion years, allowing life a chance to evolve. More luminous main-sequence stars of the "O," "B," and "A" classes usually live less than a billion years and in exceptional cases less than 10 million [2] 2.
* They emit enough high-frequency ultraviolet radiation to trigger important atmospheric dynamics such as ozone formation, but not so much that ionisation destroys incipient life [3].
* Liquid water may exist on the surface of planets orbiting them at a distance that does not induce tidal lock (see next section and 3.2).

These stars are neither "too hot" nor "too cold" and live long enough that life has a chance to begin. This spectral range likely accounts for between 5 and 10 percent of stars in the local Milky Way galaxy. Whether fainter late K and M class ("red dwarf") stars are also suitable hosts for habitable planets is perhaps the most important open question in the entire field of planetary habitability given that the majority of stars fall within this range; this is discussed extensively below."

This, and more, available on the free, online encyclopedia, Wikipedia at:
http://en.wikipedia.org/wiki/Planetary_habitability

Hope this helps!

Answer 2

On a star? I'm sure it's possible, but not worth the trouble. It's so much easier to have a civilization on a planet, why go to the trouble of doing it on a star?

Answer 3

Remember in class when the teacher said that there are not stupid questions. Well they lied to you. You have asked at least three stupid questions. Sorry.
B

Answer 4

same as on head of a pin...

Answer 5

no