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{{Short description|Soviet military space station program}}
{{other uses}}
{{use mdy dates|date=September 2021}}
{{Use American English|date=November 2020}}
[[File:Almaz drawing.svg|thumb|Line drawing of an Almaz space station]]
[[File:Центр Космонавтики и Авиации, Москва 45 - Cosmonautics and Aviation Center, Moscow.jpg|thumb|Almaz space station at [[VDNKh (Russia)]]]]
The '''Almaz''' ({{langx|ru|Алмаз|lit=Diamond}}) program was a highly secret [[Soviet Union|Soviet]] military [[space station]] program, begun in the early 1960s.

Three crewed military [[reconnaissance]] stations were launched between 1973 and 1976: [[Salyut 2]], [[Salyut 3]] and [[Salyut 5]]. 
To cover the military nature of the program, the three launched Almaz stations were designated as civilian [[Salyut programme|Salyut space stations]].
Salyut 2 failed shortly after achieving orbit, but Salyut 3 and Salyut 5 both conducted successful crewed testing. 
Following Salyut 5, the [[Ministry of Defense (Soviet Union)|Soviet Ministry of Defense]] judged in 1978 that the time and resources consumed by station maintenance outweighed the benefits relative to automatic [[reconnaissance satellite]]s. Still, it had some achievements along with the Salyut program, the heritage of the twin program continues, with the [[International Space Station]] module [[Zarya (ISS module)|Zarya]] being one example.{{vague|date=September 2020}}{{Not verified in body|date=April 2021}}

The space stations' cores were known internally as OPS ({{langx|ru|ОПС}}, [[Main Missile and Artillery Directorate|GRAU index]] 11F71 and 11F71B), from "Orbital Piloted Station" ({{langx|ru|Орбитальная Пилотируемая Станция}}).<ref name="RSWops">{{Cite web |last=Zak |first=Anatoly |title=Almaz space station (OPS) 11F71 |url=https://www.russianspaceweb.com/almaz_ops.html |url-status=live |archive-url=https://web.archive.org/web/20240521144723/https://www.russianspaceweb.com/almaz_ops.html |archive-date=May 21, 2024 |access-date=September 1, 2012 |website=RussianSpaceWeb.com }}</ref> As part of the Almaz program, the Soviets developed several spacecraft for support roles—the [[VA spacecraft]], the [[Functional Cargo Block]] and the [[TKS (spacecraft)|TKS spacecraft]], which they planned to use in several combinations.<ref name=RSWtks/><ref name=EAapos/>

==Development==
[[Vladimir Chelomey]] at the [[NPO Mashinostroyeniya|OKB-52]] design bureau promoted Almaz as a response to the U.S. Air Force's [[Manned Orbiting Laboratory]] (MOL) project. MOL had been widely publicized in the American press in the early 1960s, which provided Chelomey plenty of material to use to lobby for a Soviet response.{{citation needed|date=April 2021}}

The Almaz space station program involved three major hardware components:
* Orbital Piloted Station (OPS, 11F71) module, forming the space station core,<ref name=RSWops/>
* [[Functional Cargo Block]] (FGB, 11F77), intended as resupply craft for the stations,<ref name=RSWtks/> and
* [[VA spacecraft]] (11F74, known in the West as the ''Merkur'' spacecraft), intended as launch and return vehicle for the crews,<ref name=RSWtks/> and reusable for up to 10 flights.

The OPS would have a maximum diameter of {{convert|4.15|m}}, a mass of roughly {{convert|20|t}}, and an internal habitable volume of {{convert|47.5|m3}}.<ref name=RSWops/>

Much like its [[Manned Orbiting Laboratory|MOL]]/[[Project Gemini|Gemini]] counterpart, the initial Almaz APOS space station design called for the launch of an Almaz-OPS space station and a [[VA spacecraft|VA return craft]] containing its initial three-man crew, mated together as OPS/VA atop Chelomey's UR-500 [[Proton (rocket family)|Proton rocket]].<ref name="EAapos">{{Cite web |editor-last=Wade |editor-first=Mark |title=Almaz APOS |url=http://www.astronautix.com/a/almazapos.html |url-status=live |archive-url=https://web.archive.org/web/20240509050500/http://www.astronautix.com/a/almazapos.html |archive-date=May 9, 2024 |access-date=August 31, 2012 |publisher=[[Encyclopedia Astronautica]] }}</ref> As with MOL/Gemini, once in orbit the crew would access the laboratory through a hatch in the heat shield at the bottom of the VA capsule. After an extended stay of 30 to 60 days of military observation and photography, the crew would return to Earth by way of a VA return vehicle.<ref name="RSWorigin">{{Cite web |last=Zak |first=Anatoly |title=Origins of the Almaz project |url=https://www.russianspaceweb.com/almaz_origin.html |url-status=live |archive-url=https://web.archive.org/web/20121009023440/http://www.russianspaceweb.com/almaz_origin.html |archive-date=October 9, 2012 |website=RussianSpaceWeb.com }}</ref><ref name="EAtks">{{Cite web |editor-last=Wade |editor-first=Mark |title=TKS |url=http://www.astronautix.com/t/tks.html |url-status=live |archive-url=https://web.archive.org/web/20240211031537/http://www.astronautix.com/t/tks.html |archive-date=February 11, 2024 |access-date=August 31, 2012 |website=[[Encyclopedia Astronautica]] }}</ref>

Unlike the American MOL design, the Soviets designed the Almaz to be recrewed and resupplied. For this, they created the [[TKS (spacecraft)|TKS resupply craft]] (11F72), which consisted of an FGB and a VA return craft to carry the crew, also launched together on a Proton rocket. At the station, one [[Docking and berthing of spacecraft|docking port]] would be available to receive the TKS craft once the previous crew had left the station in their VA capsule.<ref name=RSWtks/>

While the MOL was cancelled in 1969, the Almaz program was integrated into the [[Salyut programme|Salyut program]] and resulted in three flown space stations, two of which were crewed successfully. As "man-rating" the VA spacecraft and the Proton rocket took longer, the first phase called for the launch of three Almaz stations without the VA spacecraft, with the crew instead launched separately by Soyuz rocket in a modified Soyuz spacecraft. Plans called for the first three Almaz stations to be visited by three two-month-long expeditions each. This was realized fully by two missions and partially by one; however, the initial intention of launching Almaz APOS and the TKS spacecraft together with its crew in VA spacecraft would never materialize during the program, and neither would the TKS craft play its intended role as resupply craft. The Almaz APOS design, without VA spacecraft, would evolve into the Almaz OPS station cores of the Salyut program.<ref name="RSWhist">{{Cite web |last=Zak |first=Anatoly |title=History of the Almaz space stations |url=https://www.russianspaceweb.com/almaz_development.html |url-status=live |archive-url=https://web.archive.org/web/20121009083157/http://www.russianspaceweb.com/almaz_development.html |archive-date=October 9, 2012 |website=RussianSpaceWeb.com }}</ref>

===Defense measures===
In addition to reconnaissance equipment, Almaz was equipped with a unique [[Rikhter R-23|23mm Rikhter]] (factory index 261P or 225P) rapid-fire cannon mounted on the forward belly of the station. This revolver cannon was modified from the tail-gun of the [[Tupolev Tu-22]] bomber and was capable of a theoretical rate of fire of 1800-2000 (up to 2600) rounds per minute. Each 168&nbsp;gram (ammo 23-OFZ-D-R ) or 173&nbsp;gram (ammo 23-OFZ-G-R) projectile flew at a speed of 850&nbsp;m/s relative to the station. The cannon was tested at the end of the mission by firing 20 rounds, when the station was operating in uncrewed mode. To aim the cannon, which was on a fixed mounting, the entire station would be turned to face the target.<ref name="ars-2015117">{{Cite news |last=Gallagher |first=Sean |date=November 17, 2015 |title=Russian television reveals another secret: the Soviet space cannon |url=https://arstechnica.com/information-technology/2015/11/russian-television-reveals-another-secret-the-soviet-space-cannon/ |url-status=live |archive-url=https://web.archive.org/web/20230525144255/https://arstechnica.com/information-technology/2015/11/russian-television-reveals-another-secret-the-soviet-space-cannon/ |archive-date=May 25, 2023 |work=[[Ars Technica]] }}</ref> The Almaz series are the only known armed, crewed military spacecraft ever flown.

[[Salyut 3]]/OPS-2 conducted a successful remote test firing with the station uncrewed due to concerns over excessive vibration and noise.

OPS-4 was to have featured two rockets instead of the aircraft cannon, but this system has not been shown publicly and may have never been fully manufactured despite it being used experimentally.{{citation needed|date=April 2021}}

==Orbital Piloted Stations (OPS)==
Three Almaz OPS space stations were flown from 1973 to 1976 in the Salyut program: [[Salyut 2]] (OPS-1), [[Salyut 3]] (OPS-2) and [[Salyut 5]] (OPS-3).<!-- From 1965 to 1970, eight test models and two flight ready spaceframes were built. --> Five crewed Soyuz expeditions were flown to the Almaz space stations Salyut 3 and Salyut 5, with three reaching their stations and only two of the missions being considered fully successful at that time &nbsp;— the three crews that had reached their stations had crewed Almaz stations for a total of 81 days when the program was ended.<ref name=RSWhist/><ref name=astrospies />

Besides the three flown space stations OPS-1 to OPS-3, seven more spaceframes of Almaz space stations had been built when the program was cancelled: OPS-4, Almaz-205, Almaz-206, [[Almaz-T]], Almaz-T2 ([[Kosmos 1870]]), [[Almaz-1]] and [[Almaz-2]], with Almaz-T2 and Almaz-1 having successfully flown as repurposed uncrewed radar-carrying reconnaissance satellites (see below). The partially outfitted hulls of Almaz-205 and Almaz-206 are today owned by Excalibur Almaz, a company that plans to launch these as crewed space stations (see below).<ref name="RSWprog">{{Cite web |last=Zak |first=Anatoly |title=The Almaz program |url=https://www.russianspaceweb.com/almaz.html |url-status=live |archive-url=https://web.archive.org/web/20110514000112/http://www.russianspaceweb.com/almaz.html |archive-date=May 14, 2011 |website=RussianSpaceWeb.com }}</ref>

===Flown Almaz space stations===
{{main|Salyut programme}}

====OPS-1 (Salyut 2)====
{{main|Salyut 2}}
The first Almaz station (OPS-1 or Almaz 101.1) was launched on April 3, 1973. For purposes of military secrecy, it was publicly designated [[Salyut 2]] upon reaching orbit. A crew was prepared to fly to the station, but an accident days after the launch left OPS-1 disabled and depressurized.<ref name="rsw-almaz-ops1">{{Cite web |last=Zak |first=Anatoly |title=Short mission of Almaz-1 - OPS1 (Salyut-2) |url=https://www.russianspaceweb.com/almaz_ops1.html |url-status=live |archive-url=https://web.archive.org/web/20240415065630/https://www.russianspaceweb.com/almaz_ops1.html |archive-date=April 15, 2024 |access-date=July 6, 2012 |website=RussianSpaceWeb.com }}</ref>

====OPS-2 (Salyut 3)====
{{main|Salyut 3}}
OPS-2 (or Almaz 101.2), announced as [[Salyut 3]], was launched on June 25, 1974. The crew of the [[Soyuz 14]] spacecraft spent 15 days aboard the station in July 1974. A second expedition was launched toward OPS-2 in August 1974, but failed to reach the station. The station successfully remotely test-fired an onboard aircraft [[autocannon|cannon]] at a target satellite while the station was uncrewed. Salyut-3 was deorbited in January 1975.<ref name="astrospies">{{Cite web |last=Bamford |first=James |title=Astrospies |url=https://www.pbs.org/wgbh/nova/video/astrospies/ |url-status=live |archive-url=https://web.archive.org/web/20240501065844/https://www.pbs.org/wgbh/nova/video/astrospies/ |archive-date=May 1, 2024 |access-date=July 6, 2012 |website=[[Nova (American TV program)|NOVΛ]] |publisher=[[PBS]] }}</ref>

====OPS-3 (Salyut 5)====
{{Main|Salyut 5}}
OPS-3 (or Almaz 103), announced after launch as [[Salyut 5]], entered orbit on June 22, 1976. It was visited by two crews in mid-1976 and late 1977. Salyut 5 was deorbited on 8 August 1977, and broke up as it reentered the Earth's atmosphere.<ref name="EA-S5">{{cite encyclopedia|last=Wade|first=Mark|title=1976.06.22 - Salyut 5|url=http://www.astronautix.com/details/sal52008.htm|encyclopedia=Encyclopedia Astronautica|access-date=1 January 2011|url-status=dead|archive-url=https://web.archive.org/web/20111010213804/http://astronautix.com/details/sal52008.htm|archive-date=10 October 2011}}</ref>

===Unflown Almaz space stations===
====OPS-4====
The next Almaz station, OPS-4, was to be the first station launched with a three panel [[Mech-A]] [[synthetic-aperture radar]] and a crewed reusable  Return Vehicle, but the VA was replaced by a second TKS docking port. This station's [[Shchit-1]] 23&nbsp;mm defense [[autocannon]] was also to be replaced with an advanced Shchit-2 [[space weapon|space-to-space]] cannon. The Shchit-2 was reported to be a two projectile system, although no photographs of it have ever been published and it does not appear that this system was ever installed on the station. OPS-4 was grounded when the Almaz crewed program was cancelled.<ref>{{Cite web |title=OPS-4 space station |url=https://www.russianspaceweb.com/almaz_ops4.html |access-date=2025-04-03 |website=www.russianspaceweb.com}}</ref>

{{anchor|T}}
==Almaz-T (uncrewed)==
[[Image:Almaz radar satellite.svg|thumb|Almaz radar satellite (based on Almaz space station).]]
Following cancellation of the program, the Almaz station was reconfigured as an uncrewed heavy radar-carrying [[reconnaissance satellite]]. Three such satellites were launched, two of which functioned successfully in orbit.<ref name="rsw-almaz-t">{{Cite web |last=Zak |first=Anatoly |title=Almaz-T spacecraft |url=https://www.russianspaceweb.com/almazt.html |url-status=live |archive-url=https://web.archive.org/web/20121009023810/http://www.russianspaceweb.com/almazt.html |archive-date=October 9, 2012 |access-date=August 30, 2012 |website=RussianSpaceWeb.com }}</ref>

===Almaz-T===
'''Almaz-T''' – The first Almaz-T blasted off from Baikonur on November 29, 1986.  It did not reach orbit due to the failure of the first and second stages of the Proton launcher to separate. The safety system then destroyed the vehicle.

===Almaz-T2 (Kosmos 1870)===
'''[[Kosmos 1870]]''' – On July 25, 1987, Almaz-T2, the second Almaz-T spacecraft, successfully reached orbit with an inclination 71.92 degrees toward the Equator and it was officially identified as Kosmos-1870. The spacecraft functioned for two years, providing [[Imaging radar|radar imagery]] with a resolution down to 25 meters, until it was deorbited on July 30, 1989.

It was the first <!--private {{dubious}}--> commercial radar satellite, according to Art Dula, chairman of [[Excalibur Almaz]], who worked in a company marketing the radar images gathered by the satellite.<ref name=mbEA1>{{cite web|title=Interview with Art Dula (Chairman Excalibur Almaz) – Part 1|url=http://vimeo.com/43503094|publisher=moonandback.com (vimeo.com)|access-date=4 September 2012}}</ref>

===Almaz-1===
'''[[Almaz-1]]''' – The third Almaz-T spacecraft was launched on March 31, 1991, under the name Almaz-1. After the launch a failure of the communications antenna designed to downlink the imagery via the [[Luch (satellite)|Luch]] relay satellite was noted. Also one of the solar panels failed to deploy completely, leaving the main radar panel of the spacecraft partially blocked. After 18 months of successful work the Almaz-1 was deorbited on October 17, 1992, over the Pacific Ocean.{{Clarify|date=March 2014}}
[[image:Almaz-1A.jpg|thumb|Almaz-1A]]

===Almaz-2===
'''[[Almaz-2]] (Almaz-1V)''' –  Not flown. It had a new radar that would have provided a resolution of 5 to 7 meters. In addition, an optical-electronic payload on the station would have been capable of producing imagery with a resolution of 2.5 to 4 meters.

== Legacy ==
The heritage of the Almaz space station program continues into the present, as in the International Space Station and in the [[Tianhe core module]] of the [[Tiangong space station]].

=== DOS space station cores ===
{{Main|Salyut programme}}
The DOS (Durable Orbital Station) space station core modules were based on the Almaz-OPS hull design, which was mated by [[Sergei Korolev]]'s organization [[Energia (corporation)#History|OKB-1]] with their own Soyuz-derived subsystems. OKB-1 was at that time in competition with the designer of the Almaz, Vladimir Chelomei's organization OKB-52, and was thereby able to short-cut the development time for the first space station and beat OKB-52, which had started design work much earlier.<ref name="grahn-salyut-1">{{Cite web |last=Grahn |first=Sven |title=Salyut-1, its origin, flights to it and radio tracking thereof |url=http://www.svengrahn.pp.se/trackind/salyut1/salyut1.html |url-status=live |archive-url=https://web.archive.org/web/20231128133453/http://www.svengrahn.pp.se/trackind/salyut1/salyut1.html |archive-date=November 28, 2023 }}</ref>

DOS space station cores derived since 1971 from the Almaz-OPS hull design include:
* DOS-1, which formed the basis for [[Salyut 1]] space station, in 1971 the first space station in the history of space flight
* DOS-5 and DOS-6, the cores for the long lived [[Salyut 6]] and [[Salyut 7]] space stations
* DOS-7, the [[Mir Core Module]] for the [[Mir]] space station, the first modular space station
* DOS-8, the [[Zvezda (ISS module)|Zvezda "Service Module"]] for the [[International Space Station]], {{As of|2025|lc=y}} still in use

=== Functional Cargo Block (FGB) ===
{{Main|Functional Cargo Block}}
The FGB was a standalone spacecraft which was intended to function as a resupply craft for the Almaz space stations. The "functional" section of the name is representative of the fact that the FGB provided electrical power, propulsion, guidance, and docking. Cargo was presented as a large cargo bay accessible by the crew, as well as external fuel tanks. Other types of FGB existed, as it was a broad classification rather than a specific type of module. FGB-based vehicles include Transport Logistics Spacecraft (Russian Acronym: TKS) (1976–1983), Space Station modules (1985–present), and space tugs (1987–present)<ref name="nasa-mir-heritage">{{Cite tech report |last=Portree |first=David S. F. |url=https://www.hq.nasa.gov/pao/History/SP-4225/documentation/mhh/mirheritage.pdf |title=Mir Hardware Heritage |date=March 1995 |id=NASA Reference Publication 1357 |access-date=January 23, 2024 |archive-url=https://web.archive.org/web/20230512043407/https://www.hq.nasa.gov/pao/History/SP-4225/documentation/mhh/mirheritage.pdf |archive-date=May 12, 2023 |url-status=live }}</ref>

The modules based on the DOS design are not the only heritage of the Almaz program still in use: The habitat, propulsion and service module of the TKS spacecraft, the so-called Functional Cargo Block (FGB), went on to become the core of many Soviet and Russian space station modules.<ref name="RSWtks">{{Cite web |last=Zak |first=Anatoly |title=TKS transport ship 11F72 |url=https://www.russianspaceweb.com/tks.html |url-status=live |archive-url=https://web.archive.org/web/20120817070740/http://www.russianspaceweb.com/tks.html |archive-date=August 17, 2012 |access-date=August 30, 2012 |website=RussianSpaceWeb.com }}</ref>  The FGB-based [[Kvant-1]] module of the Mir space station was the first space station module of its kind, and the [[Zarya (ISS module)|Zarya]] Functional Cargo Block, which is {{As of|2018|lc=y}} still in use on the [[International Space Station]].

=== Excalibur Almaz ===
{{Main|Excalibur Almaz}}
The defunct [[private spaceflight]] company [[Excalibur Almaz]] bought the two partially completed Almaz-205 and Almaz-206 space station hulls from the Russian [[NPO Mashinostroyeniya]] (the former OKB-52) with the stated intention to outfit and launch them.<ref name="rocketeers-20110108">{{Cite web |date=January 8, 2011 |title=Excalibur Almaz Space Stations arrive on the Isle of Man |url=http://www.rocketeers.co.uk/node/1218 |url-status=dead |archive-url=https://web.archive.org/web/20130610231326/http://www.rocketeers.co.uk/node/1218 |archive-date=June 10, 2013 }}</ref><ref>{{cite web |url=https://www.youtube.com/watch?v=okOxY-qFRAc| archive-url=https://web.archive.org/web/20200515043830/https://www.youtube.com/watch?v=okOxY-qFRAc| archive-date=2020-05-15 | url-status=dead|title=Isle of Man space industry opened its doors to the world's media to show off their two space stations|author=ITV news|website=[[YouTube]]}}</ref><ref name="RSWex">{{Cite web |last=Zak |first=Anatoly |title=Almaz Excalibur |url=https://www.russianspaceweb.com/almaz_excalibur.html |url-status=live |archive-url=https://web.archive.org/web/20121003054636/http://www.russianspaceweb.com/almaz_excalibur.html |archive-date=October 3, 2012 |access-date=August 30, 2012 |website=RussianSpaceWeb.com }}</ref><ref name="rsw-almaz-205">{{Cite web |last=Zak |first=Anatoly |title=Almaz-205 |url=https://www.russianspaceweb.com/almaz_0205.html |url-status=live |archive-url=https://web.archive.org/web/20120920133400/http://www.russianspaceweb.com/almaz_0205.html |archive-date=September 20, 2012 |access-date=August 30, 2012 |website=RussianSpaceWeb.com }}</ref><ref name="rsw-almaz-206">{{Cite web |last=Zak |first=Anatoly |title=Almaz-206 |url=https://www.russianspaceweb.com/almaz_0206.html |url-status=live |archive-url=https://web.archive.org/web/20120920133436/http://www.russianspaceweb.com/almaz_0206.html |archive-date=September 20, 2012 |access-date=August 30, 2012 |website=RussianSpaceWeb.com }}</ref>
The Almaz-205 module is similar to the OPS-2 of the Salyut 3 station, while the Almaz-206 is closer to the OPS-3 of the Salyut 5 station.<ref>{{cite web|last=Brügge |first=Norbert |title=Excalibur Almaz Limited |url=http://www.b14643.de/Spacerockets_2/Diverse/Excalibur-Almaz/index.htm |publisher=B14643.de |url-status=dead |archive-url=https://web.archive.org/web/20140401200542/http://www.b14643.de/Spacerockets_2/Diverse/Excalibur-Almaz/index.htm |archive-date=2014-04-01 }}</ref>

In addition, Excalibur Almaz acquired four VA return capsule hulls (derived from the TKS/VA spacecraft) and planned to outfit and launch them as well: one was planned to be used in support of [[space tourism]] while the other three capsules were reserved for scientific and commercial payloads. The needed development of propulsion systems for the VA capsule was reportedly delegated to an unnamed European organization as early as 2009.<ref name=RSWex />

Excalibur Almaz {{As of|2012|01|lc=y}} postponed its first launch to 2015 to be able to include more lucrative deep space capabilities like [[asteroid mining]].<ref name="WSJ120620">{{Cite news |last=Rooney |first=Ben |date=June 20, 2012 |title=Fly Me to the Moon |url=https://www.wsj.com/articles/BL-TEB-4365 |url-access=subscription |url-status=live |archive-url=https://web.archive.org/web/20210308032503/https://www.wsj.com/articles/BL-TEB-4365 |archive-date=March 8, 2021 |access-date=July 6, 2012 |work=[[The Wall Street Journal]] }}</ref> However, in 2015 the company was reported to be in financial trouble, and it was not clear what happened to their spacecraft.<ref name="independent-20150311">{{Cite news |last=Owen |first=Jonathan |date=March 11, 2015 |title=Shooting for the Moon: Time is called on Isle of Man space race |url=https://www.independent.co.uk/news/science/shooting-for-the-moon-time-called-on-isle-of-man-space-race-10101750.html |url-access=limited |url-status=live |archive-url=https://web.archive.org/web/20150312112848/http://www.independent.co.uk/news/science/shooting-for-the-moon-time-called-on-isle-of-man-space-race-10101750.html |archive-date=March 12, 2015 |work=[[The Independent]] }}</ref>

Excalibur Almaz ceased operations in 2016 without ever launching a spacecraft.  As of 2021 one of the two Almaz space station hulls formerly owned by Excalibur Almaz is on permanent display at the Isle of Man Motor Museum; the disposition of the other hull is unknown.<ref>https://www.independent.co.uk/news/science/shooting-for-the-moon-time-called-on-isle-of-man-space-race-10101750.html</ref> <ref>https://www.itv.com/news/granada/2021-08-12/to-jurby-and-beyond-spacecraft-transported-to-manx-motor-museum</ref>

==See also==
{{Portal|Soviet Union|Spaceflight}}
* [[TKS (spacecraft)|TKS]], the resupply craft developed for Almaz and Salyut
* ''Bank of the Universe'', edited by Boltenko A. C., Kyiv, 2014., publishing house "Phoenix", {{ISBN|978-966-136-169-9}}
* [[List of space stations]]
* [[Lunar Orbital Station]]

==References==
{{reflist}}

==External links==
{{commons category}}
* [https://web.archive.org/web/20110514000112/http://www.russianspaceweb.com/almaz.html The Almaz Program], ''RussianSpaceWeb.com''
* [https://web.archive.org/web/20101119184429/http://astronautix.com/project/almaz.htm Almaz], ''Encyclopedia Astronautica''
* [http://www.svengrahn.pp.se/histind/Almprog/almprog.htm The Almaz Space Station Program], Sven Grahn
* [https://web.archive.org/web/20090224205405/http://ston.jsc.nasa.gov/collections/TRS/_techrep/RP1357.pdf Mir Hardware Heritage] (NASA Reference Publication 1357), David Portree
* [https://web.archive.org/web/20110825184215/http://www.pbs.org/wgbh/nova/military/astrospies.html ''Astrospies''], an episode of [[Nova (American TV program)|Nova]] covering the MOL and Almaz
* [https://www.youtube.com/watch?v=5aLguUjlbGU Inside a Soviet Spy Station], NOVA Short

{{Almaz Program}}
{{Salyut programme}}
{{Russian human spaceflight programs}}
{{Russian space program}}
{{Space stations}}

[[Category:1973 in spaceflight]]
[[Category:Salyut programme]]
[[Category:Reconnaissance satellites of the Soviet Union]]
[[Category:Space weapons]]
[[Category:Military equipment of the Soviet Union]]
[[Category:Soviet military spacecraft]]
[[Category:Human spaceflight programs]]
[[Category:Almaz program| ]]