light seconds, light years, light centuries: how to measure extreme distances - yuan-sen ting Published 9 years ago • 3.4M plays • Length 5:29 Download video MP4 Download video MP3 Similar videos 1:13 light seconds, light years, light centuries: how far are they? 4:45 how do we study the stars? - yuan-sen ting 1:55 light year, light second calculation explained! 6:09 parsecs, light years, or au? (astronomy) 1:27:52 a matter of time 5:05 measuring the universe