Khan Academy
Intergalactic Scale, Scale of the Universe, Cosmology and Astronomy
Sal narrates the last video, concentrating on the scale between stars and galaxies themselves.
Khan Academy
Red Shift, Scale of the Universe, Cosmology and Astronomy
The Red Shift concept can be one of the most confusing in physics. Learners may find it helpful to start with learning more about the Doppler Effect before introducing this video.
PBS
Pbs Learning Media: Speed of Light
This video segment adapted from Shedding Light on Science uses historical illustrations and everyday examples to show that light has a speed and does not travel instantaneously. [3:36]
PBS
Pbs Nova Online: Einstein's Big Idea
A many-faceted investigation into Albert Einstein. Includes, a Timeline, Light Stuff, Genius among Geniuses, Time Traveler, Relativity and the Cosmos, and much more. Also, Einstein Links and a Teacher's Guide are provided.
PBS
Pbs Learning Media: Light Years
This video segment adapted from Shedding Light on Science describes how astronomical distances can be measured in units of light-years, and how the finite speed of light allows astronomers to study how the universe looked long ago....
University of Nottingham
Sixty Symbols: Symbols of Physics and Astronomy: Speed of Light
The speed of light, in physics, is represented by "c", and is the topic explored by University of Nottingham physicists in this video. Watch as they talk about relative speed and measuring the speed of light. [7:32]
University of Nottingham
Sixty Symbols: Symbols of Physics and Astronomy: Jupiter
First seen by Galileo in 1610, Jupiter is known for its many moons, its massive size, and its use in the first measurement of the speed of light. University of Nottingham physicists discuss what we've learned about Jupiter since its...
NPR: National Public Radio
Npr Videos: Skunk Bear: Finding the Speed of Light With Peeps
There's a new use for those stale Easter marshmallows you have lying around - calculating a constant that governs the universe. [5:06]
Khan Academy
Khan Academy: Powers of Ten (1977)
Powers of Ten video takes us on an adventure by showing the magnitude of the universe!
Khan Academy
Khan Academy: Ways of Knowing Introduction to Cosmology
The history of the Universe decorates the night sky. Learn how to watch this history by studying cosmic light emissions. [6:22]
Khan Academy
Khan Academy: Intro to Special Relativity and Minkowski Spacetime Diagrams
Let's see how we can start to solve problems by introducing Minkowski spacetime diagrams. [13:43]
Other
You Tube: Where Does the Sun Get Its Energy?
The sun has been producing light for about five billion years but where does all its energy come from? The most common idea is that the sun is burning gas - like a giant fireball in the sky. If this were true, the sun would have gone out...