Science Fun Day - Solar System Dances

Mrs. Waddell lead one of our classes on Science Fun Day.  Each team of students was given a card that explained a solar system concept, and they had to create a dance that explained that concept .  After each team performed, the rest of the class tried to guess what the concept was.  I love how they used the shape shifters, balls, and foam pieces.  It was really fun to watch.  Can you infer the solar system concept each team is showing?