The Echoes of Light.

This article discusses the phenomenon of light echoes and how astronomers use them to study cosmic events. Light echoes occur when light from a cosmic event, such as a supernova or black hole explosion, bounces off nearby dust and takes a longer path to Earth, arriving later than the original burst's signal. By studying these echoes, astronomers can reconstruct the details of the original event and gain insights into how it evolved. The article highlights specific examples of astronomers using light echoes to study supernovae and the supermassive black hole at the center of our galaxy. Future projects and technology advancements are also mentioned, which will further enhance the study of light echoes. [Extracted from the article]