The red of Aldebaran is typical of the lower surface temperature of an older star, whereas the blue of the Pleiades reveals their high surface temperature and young age.

• 毕宿五的红色光芒是一颗典型的低表面温度的古老的恒星，而昂宿星的蓝色表面它超高的表面温度及它的年轻。