 | This timeline of spaceflight may require cleanup to ensure consistency with other timeline of spaceflight articles. See Wikipedia:WikiProject Spaceflight/Timeline of spaceflight working group for guidelines on how to improve the article. Details Concerns have been raised that:
|  |
 Launch of Voyager 2 on a Titan IIIE | |
| Orbital launches | |
|---|---|
| First | 6 January |
| Last | 27 December |
| Total | 130 |
| Catalogued | 124 |
| Rockets | |
| Maiden flights | Mu-3H Tsyklon-3 |
| Retirements | Kosmos-2I Titan IIIE |
| Crewed flights | |
| Orbital | 3 |
| Total travellers | 6 |
Spaceflight in 1977 included some important events such as the roll out of the Space Shuttle orbiter, Voyager 1 and Voyager space probes were launched. NASA received the Space Shuttle orbiter later named Enterprise, on 14 January. This unpowered sub-orbital space plane was launched off the top of a modified 747 and was flown uncrewed until 13 August until a human crew landed the Enterprise for the first time.
In August and September, the two Voyager spacecraft to the outer planets were launched. Voyager 2, launched on 20 August, went on to fly past Jupiter, Saturn, Uranus and Neptune. Voyager 1, which was launched on 5 September, flew past Jupiter and Saturn, with a planned flyby of Pluto being cancelled in favour of a closer flyby of Titan.[1]
- ^ Hughes, J. (1996) Larrousse Desk Reference Encloypedia London RD press, World Aircraft Information Files (2001) London Aerospace publishing Ltd