MinutePhysics
Do We Expand With the Universe?
The cat's out of the bag (or off the leash, in this case) regarding the expansion of the universe. In this intriguing episode, the narrator explains that space is expanding, not the objects within it. He also tells how expansion...
Curated OER
Size Does Matter
View this short clip and discover how small our universe is in comparison to the universe at large. The vastness of space is posed as analogous to the sands found on the beach. Scientists think that there are more stars in the universe...