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- Wed Apr 06, 2011 12:01 pm
- Forum: Classroom: Introductory Astronomy
- Topic: Lecture 01: A Grand Tour of the Universe
- Replies: 35
- Views: 489222
Re: Lecture 01: A Grand Tour of the Universe
This may be a silly question, but slide 9 says "Universe Age: 13.7 Billion light years" I thought that "light year" was a measure of distance. Should it say "13.7 Billion years?" I just discovered this series of lectures because of a link on APOD. So far I really like w...