History from the side of those it happened to
Astronomy
| Date | Country | Category | Title |
|---|---|---|---|
| 20 August 1977 | United States | Astronomy | Voyager 2 launches first |
| 20 August 1977 | United States | Astronomy | A probe begins the grand tour |
| 20 August 1977 | United States | Astronomy | An outer-planet observatory leaves Earth |
| 20 August 1977 | United States | Astronomy | Voyager 2 carries a Golden Record |