| Clue | Source | Date |
|---|---|---|
| Iconic Voyager 1 photograph taken 3.7 billion miles from Earth | New York Times | 24 Nov 2022 |
| *Iconic photograph taken by Voyager 1 at the request of Carl Sagan | New York Times | 24 Aug 2021 |
| Carl Sagan's sequel to 'Cosmos' | New York Times | 27 May 2017 |
| Carl Sagan's sequel to "Cosmos" |