| Year: | 1984 |
| First: | 5 Jan |
| Last: | 22 Dec |
| Total: | 129 |
| Success: | 128 |
| Failed: | 1 |
| Maidens: | Ariane 3 Atlas G |
| Retired: | Titan 24B |
| Orbital: | 8 |
| Totalcrew: | 37 |
| Firsttrav: |
The following is an outline of 1984 in spaceflight.
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There were no deep-space rendezvous in 1984.
| Start date/time | Duration | End time | Spacecraft | Crew | Remarks |
|---|---|---|---|---|---|
| 7 February | 5 hours | STS-41-B |  Bruce McCandless IIRobert L. Stewart | McCandless and Stewart rode on the Crewed Maneuvering Unit (MMUs) during the first untethered EVAs in history. Both astronauts practiced using tools and procedures for the planned capture and repair of the Solar Maximum Mission (SMM) satellite to be performed in a subsequent flight.[1] | |
| 9 February | 6 hours 17 minutes | STS-41-B Challenger | Bruce McCandless IIRobert L. Stewart | Continued testing the MMUs and practice with tools and procedures to be used with recovery and repair of the SMM satellite. | |
| 8 April 14:18 | 2 hours 38 minutes | 16:56 | STS-41-C Challenger | George NelsonJames van Hoften | Nelson rode the MMU to the SMM satellite. Van Hoften stood by in the payload bay to provide any needed assistance. After three unsuccessful attempts to capture the SMM with the Trunnion Pin Acquisition Device (TPAD) tool and one attempt to grab the satellite by hand, the spacewalkers returned to Challenger. The SMM was recovered the next day with the RMS.[2] |
| 11 April 08:58 | 6 hours 44 minutes | 15:42 | STS-41-C Challenger | George NelsonJames van Hoften | Completed repair of the SMM satellite and then continued testing of the MMU.[3] |
| 23 April 04:31 | 4 hours 20 minutes | 08:46 | Salyut 7 EO-3 | Leonid Kizim Vladimir Solovyov | Installed a new ladder to reach the ruptured Main Oxidizer Line on Salyut 7. First of five EVAs to conduct the repair. |
| 26 April 02:40 | 4 hours 56 minutes | 07:40 | Salyut 7 EO-3 | Leonid Kizim Vladimir Solovyov | Removed installation and installed a valve in the spare oxidizer line. Second of five EVAs to repair the Main Oxidizer Line on the station. |
| 29 April 01:35 | 2 hours 45 minutes | 04:20 | Salyut 7 EO-3 | Leonid Kizim Vladimir Solovyov | Installed a bypass line around the damaged section of the Main Oxidizer Line on the station. Third of five repair EVAs. |
| 3 May 23:15 | 2 hours 45 minutes | 4 May 02:00 | Salyut 7 EO-3 | Leonid Kizim Vladimir Solovyov | Installed a second bypass line and replaced thermal insulation at the Main Oxidizer Line of the station. Fourth of five repair EVAs. |
| 18 May 17:52 | 3 hours 5 minutes | 20:57 | Salyut 7 EO-3 | Leonid Kizim Vladimir Solovyov | Installed two new solar arrays onto the space station. |
| 25 July 14:55 | 3 hours 35 minutes | 18:29 | Salyut 7 EP-4 | Svetlana Savitskaya | Tested the URI multi-purpose tool with several metal samples. Savitskaya became the first women in history to perform an EVA. |
| 8 August 08:46 | 5 hours | 13:46 | Salyut 7 EO-3 | Leonid Kizim Vladimir Solovyov | Using a pneumatic press tool delivered by Soyuz T-12, the cosmonauts completed the fifth and final EVA to repair the damaged Main Oxidizer Line of the station by crimping the ends of the ruptured pipe. |
| 11 October 15:38 | 3 hours 29 minutes | 19:05 | STS-41-G Challenger | David LeestmaKathryn Sullivan | Demonstrated the use of the Orbital Refueling System, including the installation of an ORS valve maintenance kit.[4] Sullivan was the first American women and the second women in history to conduct an EVA.[5] |
| 12 November 13:25 | 6 hours | 19:25 | STS-51-A | Joseph P. AllenDale Gardner | Allen rode the MMU to the Palapa B2 satellite and retrieved it into the payload bay. Gardner and Allen then secured the satellite in the payload bay for return to Earth.[6] |
| 14 November 11:09 | 5 hours 42 minutes | 16:51 | STS-51-A Discovery | Joseph P. AllenDale Gardner | Gardner rode the MMU to the Westar 6 satellite and retrieved it into the payload bay. Allen and Gardner then secured the satellite in the payload bay for return to Earth. |