Two types of radiation are discussed in this conversation between a professional and a preteen scientist. Solar rays and galactic cosmic rays are extremely powerful and need to be shielded against when astronauts travel in space....

This flick opens by revealing the enormity and extreme heat of the sun through a very old-fashioned cartoon. A solar eclipse is explained by Mr. Nye, and a safe way to examine an image of the sun is demonstrated. That's the extent of...