A detailed examination of those grains with the infrared-sensitive Spitzer Space Telescope shows that they come from forceful collisions with some massive rocky body.
Spitzer红外天文望远镜的详细观测表明，它们产生于巨大岩质星体的强烈撞击。
2
In infrared photography, the film or image sensor used within a digital camera is sensitive to infrared lighting, which allows the camera to pick up any light that's invisible to the human eye.