21. The rate of mass loss for luminous stars depends on the metallicity and luminosity. 22. The higher mass and metallicity tend to have more planets and more massive planets. 23. It has a metallicity of-1.8, a significantly low number. 24. Only population III stars, with very low metallicity , can reach this stage. 25. Despite its younger age, it has slightly lower metallicity , approximately 90 %. 26. It is a Population I star with metallicity of 55 % greater than solar. 27. The unusually low metallicity of Vega makes it a weak Lambda Bo�tis-type star. 28. In 2004, a stellar evolutionary model of Fomalhaut yielded a metallicity of 79 %. 29. This account is consistent with the observed negative correlation between stellar metallicity and red shift. 30. It is host to K . It has about half the metallicity of our Sun.
