Science Struck
Science Struck: How Does Light Travel Through Space and Other Media?
A detailed discussion of the nature of light, how it can travel through a vacuum, and how the speed of light is affected when light travels through a medium.
Cosmos 4 kids
Cosmos4 Kids: Much Ado About Nothing
This site will explain the cold, empty space in our universe called vacuums. Site also includes a video explaining the concept.
PBS
Pbs Teachers: Mysteries of the Universe
Consider the issues surrounding the world of space exploration including the new fields of archaeoastronomy and astrobiology. Investigate zero gravity, the Big Bang theory, life in space and how sound travels in a vacuum.
Science Buddies
Science Buddies: How Does Color Affect Heating by Absorption of Light?
Light is an example of an electromagnetic wave. Electromagnetic waves can travel through the vacuum of interstellar space. They do not depend on an external medium-unlike a mechanical wave such as a sound wave which must travel through...
TED Talks
Ted: Ted Ed: How Heavy Is Air?
Too often we think of air as empty space- but compared to a vacuum, air is actually pretty heavy. Dan Quinn describes the fundamentals of air pressure and explains how it affects our bodies, the weather, and the universe at large. [3:19]