"They emit less energy, so they are fainter than the sun, and their surface temperature is rather cool, below 3800 (degrees) Kelvin (6,380 degrees Fahrenheit/3,527 Celsius) approximately. This is why the have a reddish color," Morales said.
“红矮星释放的能量更少，因此辐射出的光芒也十分微弱，它们的表面温度也很低，大约在 3,800（度）开尔文（6,380 华氏度/3,527 摄氏度）以下。这也解释了红矮星为什么是微红色的，”莫拉莱斯说道。