In many stellar disks, observers also have found the spectral signature of silicate emission, indicating that small dust grains on the disk surface have been strongly heated by the stellar radiation.

• 天文学家也发现了许多恒星气盘具有矽的发射光谱，表示盘面上的微小尘埃颗粒已被恒星辐射强烈加热。