How Do Photons Get Kicked Out?

Almost every bit of knowledge we have about the cosmos in the universe, we ave learned through interpreting light. Soth ai: What makes that light? How is it made? How does it pass to us through the universe? And then how do we figure out what it means? Ah, i would just love any information on that. Hope to hear it on the pot some day. I love the pod. Listen to every episode.