The absence of protostellar cloud material and the low velocity of the stars shows they could not have been born relatively recently or sailed in from elsewhere in the galaxy.

• 星系中缺少原恒星物质云团，而且其中的恒星运转速度低，说明恒星不可能是在最近诞生的，也不会是从星系的其他地方飘然而入。