The Sun's Energy

In this video from NOVA’s Sun Lab, explore nuclear fusion and the balance of energy in the Sun. Intense heat and pressure in the Sun’s core cause protons to fuse together to form helium atoms, a process that releases large amounts of energy. This nuclear reaction—the same process that takes place in a hydrogen bomb—has powered the Sun for more than 4 billion years. The Sun does not blow apart from the outward pressure of nuclear fusion because the inward force of gravity balances it. This video is available in both English and Spanish audio, along with corresponding closed captions. CREDITS: LICENSE:

LicenseCustom License

More videos by this producer

NOVA scienceNOW: T. Rex Blood?

In this video segment adapted from NOVA scienceNOW, learn how scientists are hoping to better understand the biology of dinosaurs by studying the insides of fossil bones. Hear about the accidental discovery of dinosaur soft tissue by paleontologist Dr. Mary Schweitzer, and how this tissue enables sc

Black Hole Apocalypse | Modeling Galaxies

Learn how computer modeling indicates that supermassive black holes may exist at the centers of all galaxies in this video from NOVA: Black Hole Apocalypse. Use this resource to stimulate student curiosity about the structure of galaxies and to provide opportunities for students to develop and use m

NOVA scienceNOW: What Will the Future Be Like? | Wearable Robots

Learn about in advances in powered exoskeletons—a kind of wearable robot—in this video adapted from NOVA scienceNOW. Correspondent and New York Times technology columnist David Pogue explores the development of sophisticated robots that can be integrated with the human body. The company Ekso Bionics