 Artist's impression of the ASTP docking | |
| Orbital launches | |
|---|---|
| First | 10 January |
| Last | 27 December |
| Total | 132 |
| Catalogued | 125 |
| National firsts | |
| Satellite |  India |
| Rockets | |
| Maiden flights | Atlas SLV-3D Centaur-D1AR Delta 3000 Diamant-BP4 Long March 2C N-I Scout F-1 Titan III(34)B |
| Retirements | Atlas SLV-3D Centaur-D1A Delta 1000 Diamant-BP4 Saturn IB Scout F-1 |
| Crewed flights | |
| Orbital | 4 |
| Suborbital | 1 |
| Total travellers | 9 |
| 1950s | |
|---|---|
| 1960s | |
| 1970s | |
| 1980s | |
| 1990s | |
| 2000s | |
| 2010s | |
| 2020s | |
This science-related list is incomplete; you can help by adding missing items. (July 2019)
In 1975 several notable events happened in spaceflight such as the launch and arrival at Venus of Venera 9 and 10, the launch to Mars of the Viking orbiter/landers missions, the joint Apollo–Soyuz Test Project, and the launch of satellite Aryabhatta.
- The Venera 9 mission was launched 8 June 1975 and on 20 October 1975 became the first spacecraft to orbit Venus; two days later its lander returned the first images from the surface of any planet (other than Earth).
- Venera 10 was launched on 14 June 1975; it entered orbit of Venus on 23 October 1975 and its lander arrived on the surface of Venus on 25 October 1975. Both Venera 9 and Venera 10 returned various scientific observations of Venus and black-and-white television pictures from the planet's surface.
- Viking 1 was launched on 20 August 1975 and Viking 2 was launched 9 September 1975. This orbiter/lander mission was to photograph the surface of Mars in 1976.
- The Apollo-Soyuz saw an end to the space race with the US and USSR. The mission was launched between 15 July 1975 and 17 July 1975.
- On 19 April India launched its first satellite, Aryabhatta with success.
