Watch PBS Space Time channel starting from the early videos: https://www.youtube.com/channel/UC7_gcs09iThXybpVgjHZ_7g/videos?view=0&sort=da&flow=grid https://w

Watch PBS Space Time channel starting from the early videos: https://www.youtube.com/channel/UC7_gcs09iThXybpVgjHZ_7g/videos?view=0&sort=da&flow=grid https://www.youtube.com/channel/UC7_gcs09iThXybpVgjHZ_7g/vid... They range from easy to follow to quite technical.