Neil deGrasse Tyson: My Favorite Universe Lectures

Link to lectures:

1 - On Being Round

2 - On Being Rarefied

3 - On Being Dense

4 - Death by Black Hole

5 - Ends of the World

6 - Coming Attractions

7 - Onward to the Edge

8 - In Defense of the Big Bang

9 - The Greatest Story Ever Told

10 - Forged in the Stars

11 - The Search for Planets

12 - The Search for Life in the Universe