You probably learned we once had nine planets in our Solar System. Now we have only eight! What happened? Astronomers from all over the world had a meeting to decide on the definition of a planet. When they were finished Pluto was no longer considered to be a planet. It is now called a dwarf planet.
Watch the Space School Pluto video to find out more about Pluto and its reclassification from planet to dwarf planet. You will use the video to help you answer the questions that follow. You may pause the video to record your answers. You should also make sure the Close Captioning (CC) button is turn on.