Step 1- Watch and read the following
Watch The Known Universe under the Instructor Insights section. Or find it at: https://www.youtube.com/watch?v=17jymDn0W6U . If the link does not work, please cut and paste the address directly to your browser. Watch it on as big a screen as you can! Not on your phone…
Read "What is a Light Year" under the Instructor Insights section. Or find it at: http://earthsky.org/space/what-is-a-light-year
Step 2- Respond to the following:
What does a Light Year measure? Is it a unit of time? Explain.
According to your reading, how old is our Universe?
Based on the two points above, what is the greatest distance light could have traveled since the universe formed?
Why does the "Known Universe" tour STOP at a certain point? Why is this the farthest we can see?