Some questions about globular clusters:
Are globular clusters stable structures? Or are they just a bunch of stars collapsing under their mutual gravitational pull?
But if they are stable (or metastable even), what is the dynamics stopping their collapse?
Has there been any research that looks at redshifts from individual stars in a globular cluster, to determine the velocity of each star, and to eventually get a detailed picture of glob dynamics?
I haven't a clue of the answers; just contemplating what might be, after seeing Tony's fab pic of Tucanae 47.
