Einstein's Relativity Nature of reality Time

At Big Think: How reality is shaped by the speed of light

Adam Frank writes: KEY TAKEAWAYS When you look at a picture of a galaxy that is 75 million light-years away, you are seeing that galaxy at a time when dinosaurs ruled the Earth.  Distance translates into time because the speed of light is finite.   What you perceive as “now” is really layer after layer of light Read More…