Astronomers have also detected older and smaller M stars, previously thought to be quite dim, that actually outshine the sun in their X-ray emission.

• 天文学家还探测到有一些较老较小的M型星，它们发射的X射线实际上比太阳更加光辉灿烂，而先前人们却认为它们是十分幽暗的。