| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| The 200-inch mirror of the Hale Telescope on this California peak took some 10 months to cool after casting | Mt. Palomar | $1,000 | J | ASTRONOMY | 2009-09-21 | #5751 | |
| Until 1974, the 200-inch Hale Telescope on this California mountain was the world's largest reflector | Mt. Palomar | $600 | DJ | ASTRONOMY | 1998-04-16 | #3149 |