It might look like a solid object, but the Sun is very different from Earth. Find out what it's made of, and how reactions inside the Sun generate all that energy and drive powerful solar storms.

Play the Sun Lab: http://www.pbs.org/wgbh/nova/labs/lab/sun/

Find discussion questions for this video and other resources in the Sun Lab collection on PBS LearningMedia: http://www.pbslearningmedia.org/resource/nvsl.sci.space.anatsun/the-anatomy-of-the-sun/