| 21. | This is a G-type main sequence star of class G8.
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| 22. | Westerlund 2 also contains a large number of pre-main sequence stars with masses below.
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| 23. | It is a red dwarf, an M-type main sequence star.
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| 24. | Their combined stellar classification is F4V, matching that of an F-type main sequence star.
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| 25. | The primary component is a white A-type main sequence star.
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| 26. | This is a B-type main sequence star with a stellar classification of B9 Vn.
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| 27. | The internal structure of a main sequence star depends upon the mass of the star.
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| 28. | Delta Arae is massive B-type main sequence star with a stellar classification of B8 Vn.
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| 29. | O class main sequence stars are already highly luminous.
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| 30. | It is thought to be a B-type main sequence star accreting mass from the primary.
|
