RKK Energia Soyuz capsule (reusable heatshield era)
RKK Energia · Reusable Capsule · Russia · Early Jet (1946–1969)
The Soyuz spacecraft is the longest-serving crewed spacecraft in history. Designed at OKB-1 (now RKK Energia) under Sergei Korolev between 1962 and 1966, the first Soyuz launched on 23 April 1967 and Soyuz capsules have flown continuously ever since. Approximately 150 Soyuz spacecraft have been launched as of 2026 — far more than any other crewed vehicle, and the type has flown astronauts to the Salyut, Mir, and International Space Station programmes for 60 years. Soyuz capsules have a perfect record of zero in-orbit fatalities since 1971 and the vehicle remains the workhorse Russian crewed spacecraft.
The Soyuz architecture is a three-module spacecraft: a spherical orbital module (1.2 m diameter, used for living space and EVA preparation), a bell-shaped descent module (the only part that returns to Earth), and a cylindrical service module (engines, propellant, solar panels). Total mass at launch about 7 tonnes; crew capacity three astronauts. The descent module uses ablative heatshield, parachutes, and retro-rocket soft-landing thrusters that fire in the last meter to make the touchdown survivable. Landing site is typically the Kazakh steppe near Karaganda.
Soyuz suffered two fatal accidents early in its career. Soyuz 1 (24 April 1967) killed cosmonaut Vladimir Komarov when the descent-module parachute failed; Soyuz 11 (30 June 1971) killed cosmonauts Dobrovolski, Volkov, and Patsayev when a faulty valve depressurised the descent module during re-entry. Both accidents drove fundamental redesigns; the resulting Soyuz 7K-T variant (1973) added intra-vehicular pressure suits as a depressurization safety. No Soyuz crew has been killed in space since 1971 — the longest fatality-free streak of any crewed spacecraft.
The Soyuz family has gone through major variants: 7K-OK (1967), 7K-T (1973), Soyuz-T (1979), Soyuz-TM (1986), Soyuz-TMA (2002), and Soyuz-MS (2016, current). Each generation refreshed avionics, communications, and life-support systems while retaining the basic three-module architecture. Soyuz-MS spacecraft fly to the International Space Station from Baikonur Cosmodrome in Kazakhstan, and Soyuz capsules have ferried U.S., European, Japanese, and Canadian astronauts to ISS during the post-Shuttle 2011-2020 period before SpaceX Crew Dragon resumed U.S. crewed access in 2020.
For Kids — a shorter, friendlier version
The Soyuz is a Russian spacecraft. It has been carrying space crews since 1967 — almost 60 years of work. That makes it the longest-flying crewed spacecraft ever. About 140 Soyuz missions have flown.
A Soyuz has three parts. The descent module is where the crew sits — it's the only part that comes home. The orbital module gives extra room in space. The service module has the engines, batteries, and oxygen tanks. The whole craft is about 25 feet long — smaller than a school bus — and fits 3 people.
Soyuz launches on a Soyuz rocket from Baikonur in Kazakhstan. After about 6 hours, the Soyuz reaches the International Space Station. The crew stays at the ISS for months. Then they climb back into Soyuz to come home.
The descent module splits away from the rest. A small engine slows it down. It then drops out of orbit and floats to a landing under big parachutes. The landing happens in the deserts of Kazakhstan.
From 2011 to 2020, the Soyuz was the only way to send astronauts to the International Space Station. NASA's Space Shuttle had retired. SpaceX Crew Dragon didn't fly yet. Every American astronaut who went to space during those 9 years rode in a Russian Soyuz.
Fun Facts
- The Soyuz has been carrying crews to space since 1967 — almost 60 years of continuous service.
- About 140 Soyuz missions have flown since the program started.
- From 2011 to 2020, the Soyuz was the only spacecraft sending astronauts to the International Space Station.
- A Soyuz carries 3 people at a time — pilot in the middle, two others on either side.
- Soyuz launches from Baikonur Cosmodrome in Kazakhstan — the world's first and largest spaceport.
- The Soyuz descent module lands by parachute in the deserts of Kazakhstan, exactly like it did in 1967.
- Every American astronaut who went to space between 2011 and 2020 rode in a Russian Soyuz spacecraft.
Kids’ Questions
Why has Soyuz lasted so long?
Soviet engineers in the 1960s wanted a spacecraft that was simple, reliable, and easy to fix. The Soyuz was the answer. Over the years, Russian engineers have updated the electronics, computers, and engines — but the basic design has stayed the same. New Soyuz crews train on the same basic spacecraft that Yuri Gagarin's friends used in 1967. The Soyuz isn't fancy (no big computer screens, no fancy comfort features), but it's reliable. Out of 140+ flights, only two Soyuz missions have lost their crews — and those were in 1967 and 1971. Since 1971, every Soyuz crew has come home safely.
How is Soyuz different from SpaceX Crew Dragon?
The Soyuz is small (25 feet long, 3 crew). Crew Dragon is bigger (27 feet, 7 crew capacity, though usually 4). The Soyuz is launched on a Soyuz rocket; Crew Dragon launches on a SpaceX Falcon 9 rocket. The Soyuz lands by parachute on dry land in Kazakhstan; Crew Dragon splashes down in the ocean off Florida. Crew Dragon has touchscreens and is more comfortable inside. The Soyuz has manual controls and basic instruments — but the same Russian dependability that's worked for 60 years. NASA uses both: Crew Dragon for most missions, Soyuz for a few crew rotations as a backup.
Variants
- Soyuz 7K-OK (original, 1967-1971)
- First-generation crewed Soyuz. Soyuz 1 through Soyuz 11. Two fatal accidents (Soyuz 1 and Soyuz 11) drove redesign of the descent-module life-support systems.
- Soyuz 7K-T / Soyuz-T (1973-1986)
- Pressure-suited safer variants. Used for Salyut space-station ferry duty. About 40 missions.
- Soyuz-TM / Soyuz-TMA (1986-2011)
- Updated avionics + dedicated digital flight-control. Used for Mir and early-ISS missions. Soyuz-TMA (2002) added Western-fitted seats to accommodate larger U.S. astronauts.
- Soyuz-MS (2016-present)
- Current production variant. Glass-cockpit avionics, GLONASS navigation, upgraded heat-shield. As of 2026 the Soyuz-MS is the in-service ISS crew-ferry vehicle.
Notable Operators
- Roscosmos / RKK Energia
- Lead operator throughout. RKK Energia is the prime contractor for Soyuz spacecraft assembly; Roscosmos operates the missions. Launches from Baikonur Cosmodrome, Kazakhstan.
- International (ESA, JAXA, CSA, NASA)
- Sent astronauts on Soyuz spacecraft to ISS during the 2011-2020 post-Shuttle gap. About 50 non-Russian cosmonauts have flown on Soyuz, including U.S., European, Japanese, and Canadian astronauts.
Frequently Asked Questions
Is Soyuz still flying?
Yes — Soyuz-MS spacecraft continue to ferry crews to the International Space Station as of 2026. Russia operates ~2 Soyuz crewed flights per year. The type also flies in uncrewed Progress cargo configuration. Soyuz is expected to continue in service until ISS de-orbit (currently scheduled for 2030).
How many Soyuz flights have there been?
Approximately 150 Soyuz spacecraft launches since 1967 — far more than any other crewed-class vehicle. The Space Shuttle flew 135 missions; SpaceX Crew Dragon has flown about 12 as of 2026. Soyuz is the longest-serving crewed spacecraft in history.
Why does Soyuz fire retro-rockets at landing?
The descent module would hit the ground at about 7 m/s under parachute alone — survivable but injurious. Soyuz fires solid-propellant soft-landing rockets in the last 0.7 m of descent, slowing the impact to about 1 m/s. The result is a hard but safe landing for the three crew. The technique is unique to Soyuz; Western capsules splash down in water.
How many people have died in a Soyuz?
Four — Vladimir Komarov on Soyuz 1 (24 April 1967, parachute failure) and Georgy Dobrovolski, Vladislav Volkov, and Viktor Patsayev on Soyuz 11 (30 June 1971, descent-module depressurisation). No Soyuz crew has been killed in space since 1971 — 55 years of fatality-free crewed operations.
What is the difference between Soyuz and Crew Dragon?
Soyuz uses a three-module architecture (orbital + descent + service) with ground landing in Kazakhstan. SpaceX Crew Dragon is a single conical capsule with water splashdown off the Florida coast. Both ferry 3-4 astronauts to ISS; Crew Dragon is partially reusable, Soyuz is fully expendable.
Sources
See Also
- SpaceX Crew Dragon — Modern U.S. crewed spacecraft (sister capsule)
- Apollo Command/Service Module — U.S. counterpart from the Apollo era
- Space Shuttle Orbiter — U.S. crewed ISS ferry 1981-2011 (predecessor role)
- Mercury Capsule — First U.S. crewed spacecraft (sister-era)
- V-2 rocket — Origin of Korolev's R-7 launch vehicle