Comparing Sizes of Objects in our Universe

Here a video comparing sizes of objects in the universe

Planets; Why Pluto Isn't Anymore

I found this video at Edublogs.tv, a video web site, much like youtube, that was created for teachers and students.

First positive about this site is it's accessible inside our school, and it allows us and our students to create videos, upload them to edublogs.tv, and share them with the world.