In outer space there is utter silence. There are no sounds of traffic jams or thunderstorms or crashing waves. No buzzing bees or babies crying. Just silence. In this experiment, you will discover why empty space is void of sound.

Great lesson plans covering a wide-range of science-related subjects. A wonderful resource for wonderful teachers!

Kids learn about telescopes in the science of physics including lenses, mirrors, refracting, reflecting, the history, and the Hubble Space Telescope.

Read about the life of Isaac Newton and his many accomplishments in physics, mathematics, optics, and religious study, and how his discoveries helped in space research.

Dark energy, described here, is the ultimate mystery for scientists. It is the force that is causing the expansion of the universe they believe. "Explain It In 60 Seconds" is an article series that aims to summarize in a few paragraphs...

A collection of audio lectures from an introduction to astrophysics course taught at the University of California, Berkeley. The course discusses the solar system, stars, quantum mechanics, gravitation, and cosmology focusing on how...

Kids learn about the astronauts who travel and explore outer space including spacesuits, fun facts, and famous adventurers like Buzz Aldrin, Yuri Gagarin, and Sally Ride.