| Clue | Source | Date |
|---|---|---|
| 17th-century Dutch inventor of the pendulum clock who also discovered the moon Titan | The Times Specialist | 10 Aug 2026 |
| Dutch polymath Christiaan ____ invented the pendulum clock and discovered Titan, Saturn’s largest moon | The Times Specialist Sunday | 25 Aug 2019 |
| Christiaan who invented the pendulum clock | LA Times Daily | 23 May 2015 |
| Christiaan who invented the pendulum clock | ||
| Cassini-___ (spacecraft on Saturn) | ||
| Pendulum-clock pioneer | ||
| Dutch physicist of seventeenth century. |