| 21. | Sigma Ceti is an F5V Dwarf star with an effective temperature of 6600 Kelvin.
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| 22. | This planet is one of the most massive found around a red dwarf star.
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| 23. | Red dwarf stars are unstable and eject frequent solar flares.
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| 24. | A 1938 paper co-written with Robert Serber explored the properties of white dwarf stars.
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| 25. | Eta Chamaeleontis is an B8V dwarf star with an effective temperature of 12000 Kelvin.
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| 26. | HD 108541 is n B8V Dwarf star with an effective temperature of 10000 Kelvin.
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| 27. | It is one of the largest and brightest M class red dwarf stars known.
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| 28. | The planet was discovered orbiting the yellow dwarf star now designated XO-1 in 2006.
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| 29. | Among the subjects of his research were white dwarf stars, supernovae and galactic astronomy.
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| 30. | Luyten's major field of research was devoted to the discovery of white dwarf stars.
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