4 Let"s bring in some of what we know about stars just by their location on an H-R Diagram. On your plot for 47 Tuc, identify the red giant stars...

5. <4> Let"s bring in some of what we know about stars just by their location on an H-R Diagram. On your plot for 47 Tuc, identify the red giant stars (just draw an oval around them all). Why are these stars so much brighter than main sequence stars of the same color? Why are there no O- or B-type stars in 47 Tuc?