Nina is joined by explorers Dylan and Ewan to investigate how many planets are in our solar system.

Originally released by BBC, 2013. Streaming video file encoded with permission for digital streaming by Infobase on November 17, 2016.

Meet the Neurons (0:55); --What Planets Are Near Us in Space? (2:12); -- Senses Experiment (3:11); -- How Far Away Are the Planets? (3:43); -- Distance Around the Sun (2:03); -- Summary: What Planets Are Near Us in Space? (0:37); -- Credits: Solar System—Nina & the Neurons: Earth Explorers (1:32); .