Exploring the Notion of Looking into the Past through Light Travel Time

This chapter discusses the intriguing concept of looking into the past through light travel time and the speed of light. It explores how our perception functions with light signals, the varying speeds of light in vacuums and mediums, and the implications on observing distant celestial objects as they appeared in the past. The potential use of technology to capture and decelerate light for observing past events, including the possibility of observing oneself in the past, is also examined.