# Soyuz Soyuz is the Soviet/Russian crewed spacecraft family that has been in continuous service since 1967 — the longest-operating crewed spacecraft design in history, and for nine years (2011–2020) the only vehicle capable of carrying astronauts to the [[International Space Station]] after the retirement of the [[Space Shuttle]]. The name applies to both the spacecraft (a three-module capsule: orbital module, descent module, service module) and the Soyuz family of launch vehicles that carry it to orbit. ## Design and longevity The original Soyuz spacecraft was designed by Sergei Korolev's OKB-1 design bureau in the 1960s as the Soviet counterpart to America's Apollo program. Its basic architecture — a bell-shaped descent module for reentry, a spherical orbital module for habitation, and a cylindrical service module for propulsion and power — has remained fundamentally unchanged across dozens of variants and over 150 crewed flights. This conservatism is the point: the Soyuz trades capability and comfort for extreme reliability, a design philosophy that prioritizes getting crews to orbit and back alive over every other consideration. The Soyuz rocket family, derived from the R-7 ICBM that launched [[Sputnik]] in 1957, is the most-flown orbital launch vehicle in history (over 1,900 launches). Its reliability record — while not perfect (the Soyuz program has experienced fatal accidents, most recently the Soyuz 11 cabin depressurization in 1971 that killed three cosmonauts) — has been strong enough to make it the default crew-transport vehicle for the ISS partnership for decades. ## The dependency window The Soyuz's significance for the vault centers on the 2011–2020 dependency window. After the Space Shuttle's retirement in July 2011, the United States had no independent means of sending astronauts to orbit. Every American astronaut who reached the ISS for nine years rode a Russian Soyuz, at a cost that rose from approximately $21 million per seat in 2006 to over $90 million per seat by 2020 — a pricing curve that reflected both inflation and Russia's monopoly leverage. This dependency was strategically extraordinary: at the same moment the United States was imposing sanctions on Russia over Crimea (2014) and election interference (2016–2017), it was paying Russia hundreds of millions of dollars annually for the only ride to its own space station. The dependency ended in May 2020 when SpaceX's Falcon 9/Crew Dragon carried NASA astronauts to the ISS (Demo-2), but it was replaced by a new dependency — on [[Elon Musk]]'s company rather than on Russia. ## KB significance Soyuz is the vault's cleanest illustration of the strategic-dependency problem that runs through the space pages. The United States chose to retire the Shuttle without a replacement ready, accepting a known dependency on a geopolitical adversary because the alternative (extending the Shuttle program or accelerating Commercial Crew) was politically and financially inconvenient. The pattern — accepting strategic dependency today because solving it is expensive, then paying more later — recurs across the vault's coverage of supply chains, energy, and defense procurement. Russia's announced withdrawal from the ISS partnership (planned for after 2028) and the broader collapse of U.S.-Russia space cooperation following the 2022 Ukraine invasion have made the Soyuz dependency window a historical case study rather than an ongoing concern. But the structural lesson — that the United States repeatedly allows critical capabilities to lapse and then scrambles to restore them — remains active. ## See Also - [[International Space Station]] — the destination Soyuz served - [[Space Shuttle]] — the vehicle whose retirement created the dependency - Falcon 9 — the vehicle that ended the Soyuz dependency - [[SpaceX]] — the company that replaced Roscosmos as crew-transport provider - [[Cold War]] — the geopolitical context of Soyuz's origins