View full lesson: http://ed.ted.com/lessons/how-do-we-study-the-stars-yuan-sen-ting
Our best technology can send men to the Moon and probes to the edge of our solar system, but these distances are vanishingly small compared to the size of the universe. How then can we learn about the galaxies beyond our own? Yuan-Sen Ting takes us into deep space to show how astronomers study the stars beyond our reach.
Lesson by Yuan-Sen Ting, animation by Kozmonot Animation Studio.