Original content: Carl Sagan’s Cosmos - Episode 8 - Journeys in Space and time on YouTube: https://www.youtube.com/watch?v=abp3q7aYOss&t=2764s Content shown here for educational purposes only and under fair use. The late, great Carl Sagan is one of my favorites. Gotta love this guy and his passion for science. The light we see from a star has traveled for 75 years to reach Earth. If Beta Andromedae exploded last week, we wouldn't know for another 75 years. When we look into space, we're looking