Not Too Hot, Not Too Cold: Planets in the Goldilocks Zone

Do you know the story of Goldilocks and the Three Bears? Goldilocks gets into the bears house while they are out - she tries all the porridge left on the table, Papa Bear's porridge is TOO HOT! Mama Bear's porridge is TOO COLD but Baby Bear's is JUST RIGHT! So what's this have to do with exoplanets? Find out in this classroom friendly video.