Exoplanets: Other Earths Explained

Joe Hanson of It’s Okay to be Smart walks us through the fascinating history of how man first discovered the other planets in our Solar System and then to the first exoplanets. From the ancient Greeks to the Kepler telescope, it’s interesting to consider how much our knowledge of the universe has grown over the past 3,000 years. One might say, it’s grown “astronomically.”