| Questions #1, February 1, 2008 |
| Questions #2, February 8, 2008 |
| Questions #3, February 18, 2008 |
| Questions #4, February 25, 2008 |
| Questions #5, March 10, 2008 |
| Questions #6, March 24, 2008 |
| Questions #7, March 31, 2008 |
| Questions #8, April 7, 2008 |
| Questions #9, April 28, 2008 |
Exploration of the Solar System