| 1. | Granat
 - 1989 in spaceflight,
- 1989 in the Soviet Union,
- Bulgaria–Soviet Union relations,
- France–Soviet Union relations,
- Gamma-ray telescopes,
- Observational astronomy,
- Science and technology in the Soviet Union,
- Soviet space observatories,
- Space telescopes,
- Unmanned spacecraft,
- X-ray telescopes
|
