Reflection nebulas are actually made up of very fine dust that normally appears dark but can look quite blue when reflecting the light of energetic nearby stars.

• 反射星云事实上是由非常纤细的尘埃构成的，这类尘埃云通常看起来很暗，但当它反射邻近的活力四射的恒星星光时，它看起来就会非常蓝。